Sack of Delhi (1757) in the context of "Battle of Plassey"

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.

The Indian campaign of Ahmad Shah Durrani (1748–1769) was a series of invasions by the Afghan Emperor, Ahmad Shah Durrani against the declining Mughal Empire, the Maratha Empire, Sikh Confederacy, Jat Kingdom and numerous other Indian kingdoms. The primary basis of the invasions originated after the political independence of the Afghan Empire following the end of the Naderian Wars and persisted until Durrani's last invasion in 1769. The campaign is categorised into Four wars: Afghan–Mughal War, Afghan–Maratha War, Afghan–Sikh War, Afghan–Jat war and an array of local conflicts aimed at the subjugation of politically independent states such as Kalat and Kashmir.

Ahmad Shah led a total of nine invasions into India between 1748 and 1769. His objectives were met through the raids (taking the wealth and destroying sacred places belonging to the Indians) and deepening the political crisis in India. Of the invasions, the most significant attacks were in 1757 and 1761; sacking the city of Delhi in 1757, and defeating the Maratha confederacy at the decisive Third Battle of Panipat. His later invasions focused on conflicts with the Sikhs and stability of Durrani domains in Punjab.