India and U.S.A. are the two largest democracies in the world. During 1947-2001 the relations between the two countries were marked by two opposite features. On one side, there was a spirit of co-operation and friendship between the two countries. But on the other, their relations were strained and conflicting. There has been, however, a marked improvement in the relations between the two countries since 2000 A.D. Both these countries are fighting against terrorism.

The U.S.A. had begun to give massive military aid to Pakistan. This was strongly opposed by India. The lowest point in the Indo-US relations came in 1971 when India signed the Treaty of peace, friendship and co-operation with the USSR. India’s peaceful nuclear explosion on May 18, 1974, at Pokhran was strongly criticised by the US leaders and the people. There has been a marked improvement in the relations between America and India since 2001 A.D. The President of the U.S.A. Barack Obama visited India in January 2015.