Afghanistan,[d] officially the Islamic Emirate of Afghanistan,[e] is a landlocked country located at the crossroads of Central Asia and South Asia. Referred to as the Heart of Asia,[26] it is bordered by Pakistan to the east and south,[f] Iran to the west, Turkmenistan to the northwest, Uzbekistan to the north, Tajikistan to the northeast, and China to the northeast and east. Occupying 652,864 square kilometers (252,072 sq mi) of land, the country is predominantly mountainous with plains in the north and the southwest, which are separated by the Hindu Kush mountain range. Kabul is the country's largest city and serves as its capital. According to the World Population review, as of 2023, Afghanistan's population is 43 million.[6] The National Statistics Information Authority of Afghanistan estimated the population to be 32.9 million as of 2020.[28]

Human habitation in Afghanistan dates to the Middle Paleolithic era. Popularly referred to as the graveyard of empires,[29] the land has historically been home to various peoples and has witnessed numerous military campaigns, including those by the Persians, Alexander the Great, the Maurya Empire, Arab Muslims, the Mongols, the British, the Soviet Union, and a US-led coalition. Afghanistan also served as the source from which the Greco-Bactrians and the Mughals, among others, rose to form major empires.[30] The various conquests and periods in both the Iranian and Indian cultural spheres.[31][32] the area was a center for Zoroastrianism, Buddhism, Hinduism, and later Islam.[33] The modern state of Afghanistan began with the Durrani Afghan Empire in the 18th century,[34] although Dost Mohammad Khan is sometimes considered to be the founder of the first modern Afghan state.[35] Dost Mohammad died in 1863, days after his last campaign to unite Afghanistan, and Afghanistan was consequently thrown back into civil war. During this time, Afghanistan became a buffer state in the Great Game between the British Empire and the Russian Empire. From India, the British attempted to subjugate Afghanistan but were repelled in the First Anglo-Afghan War. However, the Second Anglo-Afghan War saw a British victory and the successful establishment of British political influence. Following the Third Anglo-Afghan War in 1919, Afghanistan became free of foreign political hegemony, and emerged as the independent Kingdom of Afghanistan in June 1926 under Amanullah Khan. This monarchy lasted almost half a century, until Zahir Shah was overthrown in 1973, following which the Republic of Afghanistan was established.

Since the late 1970s Afghanistan's history has been dominated by extensive warfare, including coups, invasions, insurgencies, and civil wars. The conflict began in 1978 when a communist revolution established a socialist state, and subsequent infighting prompted the Soviet Union to invade Afghanistan in 1979. Mujahideen fought against the Soviets in the Soviet–Afghan War and continued fighting among themselves following the Soviets' withdrawal in 1989. The Islamic fundamentalist Taliban controlled most of the country by 1996, but their Islamic Emirate of Afghanistan received little international recognition before its overthrow in the 2001 US invasion of Afghanistan. The Taliban returned to power in 2021 after capturing Kabul and overthrowing the government of the Islamic Republic of Afghanistan, ending the 2001–2021 war.[36] In September 2021 the Taliban re-established the Islamic Emirate of Afghanistan.[37] The Taliban government remains internationally unrecognized.[38]

Afghanistan is rich in natural resources, including lithium, iron, zinc, and copper. It is the second-largest producer of cannabis resin,[39] and third largest of both saffron[40] and cashmere.[41] The country is a member of the South Asian Association for Regional Cooperation and a founding member of the Organization of Islamic Cooperation. Due to the effects of war in recent decades, the country has dealt with high levels of terrorism, poverty, and child malnutrition. Afghanistan remains among the world's least developed countries, ranking 180th in the Human Development Index. Afghanistan's gross domestic product (GDP) is $81 billion by purchasing power parity and $20.1 billion by nominal values. Per capita, its GDP is among the lowest of any country as of 2020.

Etymology

Main article: Name of Afghanistan

Some scholars suggest that the root name Afghān is derived from the Sanskrit word Aśvakan, which was the name used for ancient inhabitants of the Hindu Kush.[42] Aśvakan literally means "horsemen", "horse breeders", or "cavalrymen" (from aśva, the Sanskrit and Avestan words for "horse").[43]

Historically, the ethnonym Afghān was used to refer to ethnic Pashtuns.[44] The Arabic and Persian form of the name, Afġān, was first attested in the 10th-century geography book Hudud al-'Alam.[45] The last part of the name, "-stan", is a Persian suffix meaning "place of". Therefore, "Afghanistan" translates to "land of the Afghans", or "land of the Pashtuns" in a historical sense. According to the third edition of the Encyclopedia of Islam:[46]

The name Afghanistan (Afghānistān, land of the Afghans / Pashtuns, afāghina, sing. afghān) can be traced to the early eighth/fourteenth century, when it designated the easternmost part of the Kartid realm. This name was later used for certain regions in the Ṣafavid and Mughal empires that were inhabited by Afghans. While based on a state-supporting elite of Abdālī / Durrānī Afghans, the Sadūzāʾī Durrānī polity that came into being in 1160 / 1747 was not called Afghanistan in its own day. The name became a state designation only during the colonial intervention of the nineteenth century.

The term "Afghanistan" was officially used in 1855, when the British recognized Dost Mohammad Khan as king of Afghanistan.[47]

History

After 2000 BCE successive waves of semi-nomadic people from Central Asia began moving south into Afghanistan; among them were many Indo-European-speaking Indo-Iranians. These tribes later migrated further into South Asia, Western Asia, and toward Europe via the area north of the Caspian Sea. The region at the time was referred to as Ariana.[48][53] By the middle of the 6th century BCE, the Achaemenids overthrew the Medes and incorporated Arachosia, Aria, and Bactria within its eastern boundaries. An inscription on the tombstone of Darius I of Persia mentions the Kabul Valley in a list of the 29 countries that he had conquered.[54] The region of Arachosia, around Kandahar in modern-day southern Afghanistan, used to be primarily Zoroastrian and played a key role in the transfer of the Avesta to Persia and is thus considered by some to be the "second homeland of Zoroastrianism

Alexander the Great and his Macedonian forces arrived in Afghanistan in 330 BCE after defeating Darius III of Persia a year earlier in the Battle of Gaugamela. Following Alexander's brief occupation, the successor state of the Seleucid Empire controlled the region until 305 BCE, when they gave much of it to the Maurya Empire as part of an alliance treaty. The Mauryans controlled the area south of the Hindu Kush until they were overthrown in about 185 BCE. Their decline began 60 years after Ashoka's rule ended, leading to the Hellenistic reconquest by the Greco-Bactrians. Much of it soon broke away and became part of the Indo-Greek Kingdom. They were defeated and expelled by the Indo-Scythians in the late 2nd century BCE.[58][59] The Silk Road appeared during the first century BCE, and Afghanistan flourished with trade, with routes to China, India, Persia, and north to the cities of Bukhara, Samarkand, and Khiva in present-day Uzbekistan.[60] Goods and ideas were exchanged at this center point, such as Chinese silk, Persian silver and Roman gold, while the region of present Afghanistan was mining and trading lapis lazuli stones[61] mainly from the Badakhshan region.

During the first century BCE, the Parthian Empire subjugated the region but lost it to their Indo-Parthian vassals. In the mid-to-late first century CE the vast Kushan Empire, centered in Afghanistan, became great patrons of Buddhist culture, making Buddhism flourish throughout the region. The Kushans were overthrown by the Sassanids in the 3rd century CE, though the Indo-Sassanids continued to rule at least parts of the region. They were followed by the Kidarites who, in turn, was replaced by the Hephthalites. They were replaced by the Turk Shahi in the 7th century. The Buddhist Turk Shahi of Kabul was replaced by a Hindu dynasty before the Saffarids conquered the area in 870, this Hindu dynasty was called Hindu Shahi.[62] Much of the northeastern and southern areas of the country remained dominated by Buddhist culture.[63][64]

Medieval period

Arab Muslims brought Islam to Herat and Zaranj in 642 CE and began spreading eastward; some of the native inhabitants they encountered accepted it while others revolted. Before the arrival of Islam, the region used to be home to various beliefs and cults, often resulting in Syncretism between the dominant religions[65][66] such as Zoroastrianism,[55][56][57] Buddhism or Greco-Buddhism, Ancient Iranian religions,[67] Hinduism, Christianity,[68][69] and Judaism.[70][71] An exemplification of the syncretism in the region would be that people were patrons of Buddhism but still worshipped local Iranian gods such as Ahura Mazda, Lady Nana, Anahita or Mihr (Mithra) and portrayed Greek gods as protectors of Buddha.[72][67][73] The Zunbils and Kabul Shahi were first conquered in 870 CE by the Saffarid Muslims of Zaranj. Later, the Samanids extended their Islamic influence south of the Hindu Kush. The Ghaznavids rose to power in the 10th century.[74][75][76]

By the 11th century Mahmud of Ghazni had defeated the remaining Hindu rulers and effectively Islamized the wider region,[77] with the exception of Kafiristan.[78] Mahmud made Ghazni into an important city and patronized intellectuals such as the historian Al-Biruni and the poet Ferdowsi.[79] The Ghaznavid dynasty was overthrown by the Ghurids in 1186, whose architectural achievements included the remote Minaret of Jam. The Ghurids controlled Afghanistan for less than a century before being conquered by the Khwarazmian dynasty in 1215.[80]

By the 11th century Mahmud of Ghazni had defeated the remaining Hindu rulers and effectively Islamized the wider region,[77] with the exception of Kafiristan.[78] Mahmud made Ghazni into an important city and patronized intellectuals such as the historian Al-Biruni and the poet Ferdowsi.[79] The Ghaznavid dynasty was overthrown by the Ghurids in 1186, whose architectural achievements included the remote Minaret of Jam. The Ghurids controlled Afghanistan for less than a century before being conquered by the Khwarazmian dynasty in 1215.[80]

In 1219 CE Genghis Khan and his Mongol army overran the region. His troops are said to have annihilated the Khwarazmian cities of Herat and Balkh as well as Bamyan.[81] The destruction caused by the Mongols forced many locals to return to an agrarian rural society.[82] Mongol rule continued with the Ilkhanate in the northwest while the Khalji dynasty administered the Afghan tribal areas south of the Hindu Kush until the invasion of Timur (aka Tamerlane), who established the Timurid Empire in 1370. Under the rule of Shah Rukh the city of Herat[83] served as the focal point of the Timurid Renaissance, whose glory matched Florence of the Italian Renaissance as the center of a cultural rebirth.[84][85]

In the early 16th century Babur arrived from Ferghana and captured Kabul from the Arghun dynasty.[86] Babur would go on to conquer the Afghan Lodi dynasty who had ruled the Delhi Sultanate in the First Battle of Panipat.[87] Between the 16th and 18th century, the Uzbek Khanate of Bukhara, Iranian Safavids, and Indian Mughals ruled parts of the territory.[88] During the medieval period, the northwestern area of Afghanistan was referred to by the regional name Khorasan, which was commonly used up to the 19th century among natives to describe their country.[89][90][91][92]

Hotak dynasty

In 1709 Mirwais Hotak, a local Ghilzai tribal leader, successfully rebelled against the Safavids. He defeated Gurgin Khan, the Georgian governor of Kandahar under the Safavids, and established his own kingdom.[93] Mirwais died in 1715 and was succeeded by his brother Abdul Aziz, who was soon killed by Mirwais's son Mahmud for possibly planning to sign a peace with the Safavids. Mahmud led the Afghan army in 1722 to the Persian capital of Isfahan, and captured the city after the Battle of Gulnabad and proclaimed himself King of Persia.[93] The Afghan dynasty was ousted from Persia by Nader Shah after the 1729 Battle of Damghan.

In 1738 Nader Shah and his forces captured Kandahar in the siege of Kandahar, the last Hotak stronghold, from Shah Hussain Hotak. Soon after, the Persian and Afghan forces invaded India, Nader Shah had plundered Delhi, alongside his 16-year-old commander, Ahmad Shah Durrani who had assisted him on these campaigns. Nader Shah was assassinated in 1747.[94][95]

Durrani empire

Main articles: Durrani Empire and Ahmad Shah Durrani

After the death of Nader Shah in 1747 Ahmad Shah Durrani had returned to Kandahar with a contingent of 4,000 Pashtuns. The Abdalis had "unanimously accepted" Ahmad Shah as their new leader. With his ascension in 1747, Ahmad Shah had led multiple campaigns against the Mughal empire, Maratha empire, and then-receding Afsharid empire. Ahmad Shah had captured Kabul and Peshawar from the Mughal appointed governor, Nasir Khan. Ahmad Shah had then conquered Herat in 1750, and had also captured Kashmir in 1752.[96] Ahmad Shah had launched two campaigns into Khorasan, 1750–1751 and 1754–1755.[97] His first campaign had seen the siege of Mashhad, however, he was forced to retreat after four months. In November 1750, he moved to siege Nishapur, but he was unable to capture the city and was forced to retreat in early 1751. Ahmad Shah returned in 1754; he captured Tun, and on 23 July, he sieged Mashhad once again. Mashhad had fallen on 2 December, but Shahrokh was reappointed in 1755. He was forced to give up Torshiz, Bakharz, Jam, Khaf, and Turbat-e Haidari to the Afghans, as well as accept Afghan sovereignty. Following this, Ahmad Shah sieged Nishapur once again, and captured it.

Ahmad Shah invaded India eight times during his reign,[98] beginning in 1748. Crossing the Indus River, his armies sacked and absorbed Lahore into the Durrani Realm. He met Mughal armies at the Battle of Manupur (1748), where he was defeated and forced to retreat back to Afghanistan.[99] He returned the next year in 1749 and captured the area around Lahore and Punjab, presenting it as an Afghan victory for this campaign.[100] From 1749 to 1767, Ahmad Shah led six more invasions, the most important being the last; the Third Battle of Panipat created a power vacuum in northern India, halting Maratha expansion.

Ahmad Shah Durrani died in October 1772, and a civil war over succession followed, with his named successor, Timur Shah Durrani succeeding him after the defeat of his brother, Suleiman Mirza.[101] Timur Shah Durrani ascended to the throne in November 1772, having defeated a coalition under Shah Wali Khan and Humayun Mirza. Timur Shah began his reign by consolidating power toward himself and people loyal to him, purging Durrani Sardars and influential tribal leaders in Kabul and Kandahar. One of Timur Shah's reforms was to move the capital of the Durrani Empire from Kandahar to Kabul. Timur Shah fought multiple series of rebellions to consolidate the empire, and he also led campaigns into Punjab against the Sikhs like his father, though more successfully. The most prominent example of his battles during this campaign was when he led his forces under Zangi Khan Durrani – with over 18,000 men total of Afghan, Qizilbash, and Mongol cavalrymen – against over 60,000 Sikh men. The Sikhs lost over 30,000 in this battle and staged a Durrani resurgence in the Punjab region[102] The Durranis lost Multan in 1772 after Ahmad Shah's death. Following this victory, Timur Shah was able to lay siege to Multan and recapture it,[103] incorporating it into the Durrani Empire once again, reintegrating it as a province until the Siege of Multan (1818). Timur Shah was succeeded by his son Zaman Shah Durrani after his death in May 1793. Timur Shah's reign oversaw the attempted stabilization and consolidation of the empire. However, Timur Shah had over 24 sons, which plunged the empire in civil war over succession crises.[104]

Zaman Shah Durrani succeeded to the Durrani Throne following the death of his father, Timur Shah Durrani. His brothers Mahmud Shah Durrani and Humayun Mirza revolted against him, with Humayun centered in Kandahar and Mahmud Shah centered in Herat.[105] Zaman Shah would defeat Humayun and force the loyalty of Mahmud Shah Durrani.[105] Securing his position on the throne, Zaman Shah led three campaigns into Punjab. The first two campaigns captured Lahore, but he retreated due to intel about a possible Qajar invasion. Zaman Shah embarked on his third campaign for Punjab in 1800 to deal with a rebellious Ranjit Singh.[106] However, he was forced to withdraw, and Zaman Shah's reign was ended by Mahmud Shah Durrani.[106] However, just under two years into his reign, Mahmud Shah Durrani was deposed by his brother Shah Shuja Durrani on 13 July 1803.[107] Shah Shuja attempted to consolidate the Durrani Realm but was deposed by his brother at the Battle of Nimla (1809).[108] Mahmud Shah Durrani defeated Shah Shuja and forced him to flee, usurping the throne again. His second reign began on 3 May 1809.[109]

Barakzai dynasty and British wars

By the early 19th century the Afghan empire was under threat from the Persians in the west and the Sikh Empire in the east. Fateh Khan, leader of the Barakzai tribe, installed many of his brothers in positions of power throughout the empire. Fateh Khan was brutally murdered in 1818 by Mahmud Shah. As a result, the brothers of Fateh Khan and the Barakzai tribe rebelled, and a civil war brewed. During this turbulent period, Afghanistan fractured into many states, including the Principality of Qandahar, Emirate of Herat, Khanate of Qunduz, Maimana Khanate, and numerous other warring polities. The most prominent state was the Emirate of Kabul, ruled by Dost Mohammad Khan.[110][111]

With the collapse of the Durrani Empire, and the exile of the Sadozai Dynasty to be left to rule in Herat, Punjab and Kashmir were lost to Ranjit Singh, ruler of the Sikh Empire, who invaded Khyber Pakhtunkhwa in March 1823 and captured the city of Peshawar following the Battle of Nowshera. In 1834, Dost Mohammad Khan led numerous campaigns, firstly campaigning to Jalalabad, and then allying with his rival brothers in Kandahar to defeat Shah Shuja Durrani and the British in the Expedition of Shuja ul-Mulk.[112] In 1837, Dost Mohammad Khan attempted to conquer Peshawar and sent a large force under his son Wazir Akbar Khan, leading to the Battle of Jamrud. Akbar Khan and the Afghan army failed to capture the Jamrud Fort from the Sikh Khalsa Army, but killed Sikh Commander Hari Singh Nalwa, thus ending the Afghan-Sikh Wars. By this time the British were advancing from the east, capitalizing off of the decline of the Sikh Empire after it had its own period of turbulence following the death of Ranjit Singh, which engaged the Emirate of Kabul in the first major conflict during "The Great Game".[113]

Afghan tribesmen in 1841, painted by British officer James Rattray

In 1839 a British expeditionary force marched into Afghanistan, invading the Principality of

Qandahar, and in August 1839, seized Kabul. Dost Mohammad Khan defeated the British in the Parwan campaign, but surrendered following his victory. He was replaced with the former Durrani ruler Shah Shuja Durrani as the new ruler of Kabul, a de facto puppet of the British.[114][115] Following an uprising that saw the assassination of Shah Shuja, the 1842 retreat from Kabul of British-Indian forces and the annihilation of Elphinstone's army, and the punitive expedition of The Battle of Kabul that led to its sacking, the British gave up on their attempts to try and subjugate Afghanistan, allowing Dost Mohammad Khan to return as ruler. Following this, Dost Mohammad pursued a myriad of campaigns to unite most of Afghanistan in his reign, launching numerous incursions including against the surrounding states such as the Hazarajat campaign, conquest of Balkh, conquest of Kunduz, and the conquest of Kandahar. Dost Mohammad led his final campaign against Herat, conquering it and re-uniting Afghanistan. During his campaigns of re-unification, he held friendly relations with the British despite the First Anglo-Afghan War, and affirmed their status in the Second Anglo-Afghan treaty of 1857, while Bukhara and internal religious leaders pressured Dost Mohammad to invade India during the Indian Rebellion of 1857.[116]

Dost Mohammad died in June 1863, a few weeks after his successful campaign to Herat. Following his death, a civil war ensued among his sons, prominently Mohammad Afzal Khan, Mohammad Azam Khan, and Sher Ali Khan. Sher Ali won the resulting Afghan Civil War (1863–1869) and ruled Afghanistan until his death in 1879. In his final years, the British returned to Afghanistan in the Second Anglo-Afghan War to fight perceived Russian influence in the region. Sher Ali retreated to northern Afghanistan, intending to create a resistance there similar to his predecessors, Dost Mohammad Khan, and Wazir Akbar Khan. His untimely death however, saw Yaqub Khan declared the new Amir, leading to Britain gaining control of Afghanistan's foreign relations as part of the Treaty of Gandamak of 1879, making it an official British Protected State.[117][118] An uprising however, re-started the conflict, and Yaqub Khan was deposed. During this tumultuous period, Abdur Rahman Khan began his rise to power, becoming an eligible candidate to become Amir after he seized much of Northern Afghanistan. Abdur Rahman marched on Kabul, and was declared Amir, being recognized by the British as well. Another uprising by Ayub Khan threatened the British, where rebels confronted and defeated British forces in the Battle of Maiwand. Following up on his victory, Ayub Khan unsuccessfully besieged Kandahar, and his decisive defeat saw the end of the Second Anglo-Afghan War, with Abdur Rahman secured firmly as Amir.[119] In 1893, Abdur Rahman signed an agreement in which the ethnic Pashtun and Baloch territories were divided by the Durand Line, which forms the modern-day border between Pakistan and Afghanistan. Shia-dominated Hazarajat and pagan Kafiristan remained politically independent until being conquered by Abdur Rahman Khan in 1891–1896. He was known as the "Iron Amir" for his features and his ruthless methods against tribes.[120] He died in 1901, succeeded by his son, Habibullah Khan.

How can a small power like Afghanistan, which is like a goat between these lions [Britain and Russia] or a grain of wheat between two strong millstones of the grinding mill, stand in the midway of the stones without being ground to dust?

— Abdur Rahman Khan, the "Iron Amir", in 1900[121][122]

During the First World War, when Afghanistan was neutral, Habibullah Khan was met by officials of the central powers in the Niedermayer–Hentig Expedition. They called on Afghanistan to declare full independence from the United Kingdom, join them and attack British India, as part of the Hindu–German Conspiracy. The effort to bring Afghanistan into the Central Powers failed, but it sparked discontent among the population about maintaining neutrality with the British. Habibullah was assassinated in February 1919, and Amanullah Khan eventually assumed power. A staunch supporter of the 1915–1916 expeditions, Amanullah Khan invaded British India, beginning the Third Anglo-Afghan War, and entering British India via the Khyber Pass.[123]

After the end of the Third Anglo-Afghan War and the signing of the Treaty of Rawalpindi on 19 August 1919, Emir Amanullah Khan declared the Emirate of Afghanistan a sovereign and fully independent state. He moved to end his country's traditional isolation by establishing diplomatic relations with the international community, particularly with the Soviet Union and the Weimar Republic.[124][125] He proclaimed himself King of Afghanistan on 9 June 1926, forming the Kingdom of Afghanistan. He introduced several reforms intended to modernize his nation. A key force behind these reforms was Mahmud Tarzi, an ardent supporter of the education of women. He fought for Article 68 of Afghanistan's 1923 constitution, which made elementary education compulsory. Slavery was abolished in 1923.[126] King Amanullah's wife, Queen Soraya, was an important figure during this period in the fight for woman's education and against their oppression.[127]

Some of the reforms, such as the abolition of the traditional burqa for women and the opening of co-educational schools, alienated many tribal and religious leaders, leading to the Afghan Civil War (1928–1929). King Amanullah abdicated in January 1929, and soon after Kabul fell to Saqqawist forces led by Habibullah Kalakani.[128] Mohammed Nadir Shah, Amanullah's cousin, defeated and killed Kalakani in October 1929, and was declared King Nadir Shah.[129] He abandoned the reforms of King Amanullah in favor of a more gradual approach to modernization, but was assassinated in 1933 by Abdul Khaliq.[130]

Mohammed Zahir Shah succeeded to the throne and reigned as king from 1933 to 1973. During the tribal revolts of 1944–1947, King Zahir's reign was challenged by Zadran, Safi, Mangal, and Wazir tribesmen led by Mazrak Zadran, Salemai, and Mirzali Khan, among others – many of whom were Amanullah loyalists. Afghanistan joined the League of Nations in 1934. The 1930s saw the development of roads, infrastructure, the founding of a national bank, and increased education. Road links in the north played a large part in a growing cotton and textile industry.[131] The country built close relationships with the Axis powers, with Nazi Germany having the largest share in Afghan development at the time.[132]

Until 1946 King Zahir ruled with the assistance of his uncle, who held the post of prime minister and continued the policies of Nadir Shah. Another uncle, Shah Mahmud Khan, became prime minister in 1946 and experimented with allowing greater political freedom. He was replaced in 1953 by Mohammed Daoud Khan, a Pashtun nationalist who sought the creation of a Pashtunistan, leading to highly tense relations with Pakistan.[133] Daoud Khan pressed for social modernization reforms and sought a closer relationship with the Soviet Union. Afterward, the 1964 constitution was formed, and the first non-royal prime minister was sworn in.[131]

Zahir Shah, like his father Nadir Shah, had a policy of maintaining national independence while pursuing gradual modernization, creating nationalist feeling, and improving relations with the United Kingdom. Afghanistan was neither a participant in World War II nor aligned with either power bloc in the Cold War. However, it was a beneficiary of the latter rivalry as both the Soviet Union and the United States vied for influence by building Afghanistan's main highways, airports, and other vital infrastructure. On a per capita basis, Afghanistan received more Soviet development aid than any other country. In 1973, while the King was in Italy, Daoud Khan launched a bloodless coup and became the first president of Afghanistan, abolishing the monarchy.

In April 1978, the communist People's Democratic Party of Afghanistan (PDPA) seized power in a bloody coup d'état against then-President Mohammed Daoud Khan, in what is called the Saur Revolution. The PDPA declared the establishment of the Democratic Republic of Afghanistan, with its first leader named as People's Democratic Party General Secretary Nur Muhammad Taraki.[134] This would trigger a series of events that would dramatically turn Afghanistan from a poor and secluded (albeit peaceful) country to a hotbed of international terrorism.[135] The PDPA initiated various social, symbolic, and land distribution reforms that provoked strong opposition, while also brutally oppressing political dissidents. This caused unrest and quickly expanded into a state of civil war by 1979, waged by guerrilla mujahideen (and smaller Maoist guerrillas) against regime forces countrywide. It quickly turned into a proxy war as the Pakistani government provided these rebels with covert training centers, the United States supported them through Pakistan's Inter-Services Intelligence (ISI),[136] and the Soviet Union sent thousands of military advisers to support the PDPA regime.[137] Meanwhile, there was increasingly hostile friction between the competing factions of the PDPA – the dominant Khalq and the more moderate Parcham.[138]

In October 1979 PDPA General Secretary Taraki was assassinated in an internal coup orchestrated by then-prime minister Hafizullah Amin, who became the new general secretary of the People's Democratic Party. The situation in the country deteriorated under Amin, and thousands of people went missing.[139] Displeased with Amin's government, the Soviet Army invaded the country in December 1979, heading for Kabul and killing Amin.[140] A Soviet-organized regime, led by Parcham's Babrak Karmal but inclusive of both factions (Parcham and Khalq), filled the vacuum. Soviet troops in more substantial numbers were deployed to stabilize Afghanistan under Karmal, marking the beginning of the Soviet–Afghan War.[141] Lasting nine years, the war caused the deaths of between 562,000[142] and 2 million Afghans,[143][144][145][146][147][148][149][excessive citations] and displaced about 6 million people who subsequently fled Afghanistan, mainly to Pakistan and Iran.[150] Heavy air bombardment destroyed many countryside villages, millions of landmines were planted,[151] and some cities such as Herat and Kandahar were also damaged from bombardment. After the Soviet withdrawal, the civil war ensued until the communist regime under People's Democratic Party leader Mohammad Najibullah collapsed in 1992.[152][153][154]

The Soviet–Afghan War had drastic social effects on Afghanistan. The militarization of society led to heavily armed police, private bodyguards, openly armed civil defense groups, and other such things becoming the norm in Afghanistan for decades thereafter.[155] The traditional power structure had shifted from clergy, community elders, intelligentsia, and military in favor of powerful warlords.[156]