Amu Darya in the context of "Balkh"

The Wakhan Corridor (Dari: دالان واخان, romanized: Dālān-i Wāxān; Pashto: واخان دهلېز, romanized: Wāxān dahlez) is a narrow strip of territory in the Badakhshan province of Afghanistan. This corridor stretches eastward, connecting Afghanistan to Xinjiang, China. It also separates the Gorno-Badakhshan Autonomous Region of Tajikistan in the north from the Khyber Pakhtunkhwa and Gilgit-Baltistan regions in Pakistan in the south. This high mountain valley, which rises to a maximum altitude of 4,923 m (16,152 ft), serves as the source of both the Panj and Pamir rivers, which converge to form the larger Amu Darya River. For countless centuries, a vital trade route has traversed this valley, facilitating the movement of travelers to and from East, South, and Central Asia.

The corridor was formed after an 1893 out of British territory from now Pakistan after an agreement between Mortimer Durand of the British Raj and Emir Abdur Rahman Khan of Afghanistan, so that the Russian dominion, now Tajikistan would not touch British dominion, now Pakistan. This agreement also created the Durand Line which today forms the border between Pakistan and Afghanistan. It was last conquered by the Durrani Empire in 1763. At the time it was carved out, the narrow strip acted as a buffer zone between the Russian Empire and the British Empire (specifically the regions of Russian Turkestan, now in Tajikistan, and the northern part of the British Raj, now in Pakistan). Its eastern end bordered China's Xinjiang region, then claimed by the Qing dynasty.

The Ghaznavid dynasty (Persian: غزنویان Ġaznaviyān) was a Persianate Muslim dynasty of Turkic mamluk origin. It ruled the Ghaznavid Empire or the Empire of Ghazni from 977 to 1186, which at its greatest extent, extended from the Oxus to the Indus Valley. The dynasty was founded by Sabuktigin upon his succession to the rule of Ghazna after the death of his father-in-law, Alp Tigin, who was an ex-general of the Samanid Empire from Balkh.

Sabuktigin's son, Mahmud of Ghazni, expanded the Ghaznavid Empire to the Amu Darya, the Indus River and the Indian Ocean in the east and to Rey and Hamadan in the west. Under the reign of Mas'ud I, the Ghaznavid dynasty began losing control over its western territories to the Seljuk Empire after the Battle of Dandanaqan in 1040, resulting in a restriction of its holdings to modern-day Afghanistan, Pakistan and Northern India.

The Hindu Kush is an 800-kilometre-long (500 mi) mountain range in Central and South Asia to the west of the Himalayas. It stretches from central and eastern Afghanistan into northwestern Pakistan and far southeastern Tajikistan. The range forms the western section of the Hindu Kush Himalayan Region (HKH); to the north, near its northeastern end, the Hindu Kush buttresses the Pamir Mountains to the north near the point where the borders of China, Pakistan and Afghanistan meet, after which it runs southwest through Pakistan and into Afghanistan near their border.

The eastern end of the Hindu Kush merges with the Karakoram Range. Towards its southern end, it connects with the White Mountains near the Kabul River. It divides the valley of the Amu Darya (the ancient Oxus) to the north from the Indus River valley to the south. The range has numerous high snow-capped peaks, with the highest point being Tirich Mir or Terichmir at 7,708 metres (25,289 ft) in the Chitral District of Khyber Pakhtunkhwa, Pakistan.

The Afghanistan–Uzbekistan border is 144 km (89 mi) in length and runs from the tripoint with Turkmenistan to the tripoint with Tajikistan along the Amu River. It is the shortest of Uzbekistan's external borders. The city of Termez in Uzbekistan and the town of Hairatan in Afghanistan are the closest major populated centers to the border.

Large volumes of trade between Afghanistan and Uzbekistan pass through the border on daily basis. Citizens of Afghanistan could stay for up to 10 days in Termez without a travel visa.

The Afghanistan–Tajikistan border is 1,357 km (843 mi) in length and runs from the tripoint with Uzbekistan in the west to the tripoint with the Xinjiang region of China in the east, almost entirely along the Amu Darya, Pyanj and Pamir Rivers, except for the easternmost section along the Wakhan Corridor and divides the ethnic Tajik community into citizens of two separate countries.

Afghan Turkestan is a region in northern Afghanistan, on the border with the former Soviet republics of Turkmenistan, Uzbekistan, and Tajikistan. In the 19th century, there was a province in Afghanistan named Turkestan with Mazar-e Sharif as provincial capital. The province incorporated the territories of the present-day provinces of Balkh, Kunduz, Jowzjan, Sar-e Pol, and Faryab. In 1890, Qataghan-Badakhshan Province was separated from Turkestan Province. It was later abolished by Abdur Rahman.

The whole territory of Afghan Turkestan, from the junction of the Kokcha river with the Amu Darya on the north-east to the province of Herat on the south-west, was some 800 kilometres (500 mi) in length, with an average width from the Russian frontier to the Hindu Kush of 183 km (114 mi). It thus comprised about 147,000 km (57,000 sq mi) or roughly two-ninths of the former Kingdom of Afghanistan.

The Durrani Empire, colloquially known as the Kingdom of Afghanistan, Afghan Empire or the Sadozai Kingdom, was an Afghan empire founded by the Durrani tribe of Pashtuns under Ahmad Shah Durrani in 1747, which spanned parts of Central Asia, the Iranian plateau, and the Indian subcontinent. At its peak, it ruled over present-day Afghanistan, much of Pakistan, parts of northeastern and southeastern Iran, eastern Turkmenistan, and northwestern India. Next to the Ottoman Empire, the Durrani Empire is considered to be among the most significant Islamic empires of the second half of the 18th century.

Ahmad was the son of Muhammad Zaman Khan (an Afghan chieftain of the Abdali tribe) and the commander of Nader Shah Afshar. Following Afshar's death in June 1747, Ahmad secured Afghanistan by taking Kandahar, Ghazni, Kabul, and Peshawar. After his accession as the nation's king, he changed his tribal name from Abdali to Durrani. In 1749, the Mughal Empire had ceded sovereignty over much of northwestern India to the Afghans; Ahmad then set out westward to take possession of Mashhad, which was ruled by the Afsharid dynasty under Shahrokh Shah, who also acknowledged Afghan suzerainty. Subsequently, Ahmad sent an army to subdue the areas north of the Hindu Kush down to the Amu Darya, and in short order, all of the different Afghan tribes began to join his cause. Under Ahmad, the Afghans invaded India on eight occasions, subjugating parts of Kashmir and the majority of Punjab. In early 1757, he sacked Delhi, but permitted Mughal emperor Alamgir II to remain in nominal control as long as he acknowledged Afghan suzerainty over the regions south of the Indus River, till Sutlej river.

Bactria (/ˈbæktriə/; Bactrian: βαχλο, Bakhlo), or Bactriana, was an ancient Iranian civilization in Central Asia, located in the area south of the Oxus River (modern Amu Darya) and north of the Hindu Kush mountains, within modern-day Afghanistan, Tajikistan and Uzbekistan. Bactria was strategically located south of Sogdia and west of the Pamir Mountains. These mountain ranges acted as "walls" protecting Bactria from three sides, with the Pamir mountains to the north and the Hindu Kush to the south forming a junction, and the Karakoram range towards the east.

Called "beautiful Bactria, crowned with flags" by the Avesta, the region is considered, in the Zoroastrian faith, to be one of the "sixteen perfect Iranian lands" that the supreme deity, Ahura Mazda, had created. It was once a small and independent kingdom struggling to survive against nomadic Turanians. One of the early centres of Zoroastrianism, and capital of the legendary Kayanian dynasty, Bactria is mentioned in the Behistun Inscription of Darius the Great as one of the satrapies of the Achaemenid Empire; it was a special satrapy, ruled by a crown prince or an intended heir. Bactria was the centre of Iranian resistance against the Greek Macedonian invaders after the fall of the Achaemenid Empire in the 4th century BC, but eventually fell to Alexander the Great.

Ai-Khanoum (/aɪ ˈhɑːnjuːm/, meaning 'Lady Moon'; Uzbek: Oyxonim) is the archaeological site of a Hellenistic city in Takhar Province, Afghanistan. The city, whose original name is unknown, was likely founded by an early ruler of the Seleucid Empire and served as a military and economic centre for the rulers of the Greco-Bactrian Kingdom until its destruction c. 145 BC. Rediscovered in 1961, the ruins of the city were excavated by a French team of archaeologists until the outbreak of conflict in Afghanistan in the late 1970s.

The city was probably founded between 300 and 285 BC by an official acting on the orders of Seleucus I Nicator or his son Antiochus I Soter, the first two rulers of the Seleucid dynasty. There is a possibility that the site was known to the earlier Achaemenid Empire, who established a small fort nearby. Ai-Khanoum was originally thought to have been a foundation of Alexander the Great, perhaps as Alexandria Oxiana, but this theory is now considered unlikely. Located at the confluence of the Amu Darya (a.k.a. Oxus) and Kokcha rivers, surrounded by well-irrigated farmland, the city itself was divided between a lower town and a 60-metre-high (200 ft) acropolis. Although not situated on a major trade route, Ai-Khanoum controlled access to both mining in the Hindu Kush and strategically important choke points. Extensive fortifications, which were continually maintained and improved, surrounded the city.