We're talking about Afghanistan & India in this case, not Nepal or China's similarities with India.
I was merely responding to the poster who said India-Afghanistan share deep cultural ties, not necessarily talking about strategic ties here.
here you go, rather than reading about hemu this would suffice :
Relations between Afghanistan and India date back to Ancient Hindu kingdoms this existed during the time of military conquests of Alexander the Great. After Alexander retreat, in 323 BCE, Chandragupta Maurya, founder of the Mauryan Dynasty, turned his attention to Northwestern India (modern Pakistan), where he defeated the satrapies left in place by Alexander.[4] Northern parts of India (presently Pakistan) has been ruled by Afghan kingdoms in the past, before the Mughal era although these Afghan kingdoms were chiefly identified as Pashtun, contrary to the current definition of the denonym "Afghan" now. India holds Indian Muslims of Pashtun origin, used to identify themselves as Indo-Afghans. Some Pathans of India, including the Rohillas identify their ancestral roots to present day Afghanistan, such as Kabul, while others identify their roots such as Peshewar and considered themselves Afghan before the Durrand agreement. Many prominent Indians identified themselves chiefly as "Afghans" but coPashtun people|nsidered the historical Pashtun definition, not the later citizenship-like definition of Afghans today which included Afghanistan inhabitants and excludes Pashtuns not indegenous to the present borders of Afghanistan. Such are Shah Rukh Khan, Salman Khan, Aamir Khan, Feroz Khan, Dilip Kumar and many more are well known celebrities who are Afghans(Pashtuns) by ethnicity. Even though establishing claims, some Indian Muslims being totally from ancestral regions such Peshawar which is not part of Afghanistan anymore but should be due to the Durand line, would identify as Indo-Afghans, from historical folktales preceding partition of Afghanistan.
The Suri dynasty and the Khilji dynasties were 2 known dynasties from India, that ruled during the middle-ages as Islamic states, and were chiefly identified as Afghan/Pashtun, until over ruled by Mughals. Eventually, the last dynasty was the Durrani empire, which had bitter relationships with the Mughals, ceased to power, after being overrun by the Sikh Empire during an attempt to annex Amritsar, causing the Durrand agreement by the British Empire, leaving Afghanistan in its present state after failed attempts to colonize further into Afghanistan.
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