1971 war was between India and Pakistan, it was a continuation of a long standing enmity and previous wars, East Pakistan was just a chip in the game, and creation of Bangladesh was the side effect...the idea was to cut Pakistan to size. And please don't kid yourself, Pakistan lost the real war to India on both western front and eastern front, and they had their real strength on western front. In eastern front Lt.Gen Arora had to take charge because it was a job of a professional army, the rag tag forces of BD got all the help from us, a full blockade on Pakistani army, training, weapons, logistics, bases, intel, but they proved to be, not discounting their valiant effort, incapable.