The core argument this article is When the nations of South Asia won their independence from British almost 69 years ago they were at once united an divided by claims of identity. Soon after independence most South Asian states were faced with various kinds of domestic conflicts. South Asia is an international sub system which assumed importance soon after the British withdrawal from region and the emergence of a number of new states which ever either parts of the British Empire or were its protectorates. British withdrawal was necessitated by their shrinking economic and military capacity to pursue a super power role and growing local opposition to their presence in the area this partial withdrawal by them is said to have created a vacuum in the area and supporters of this pernicious imperialistic theory naturally justified the entry of the US aggressive forces in to this area fulfill US interests.