Explanation

ð  The war of 1971 between India and Pakistan lasted for 13 days from 3 December 1971 to the fall of Dacca (Dhaka) on 16 December 1971 .

ð  The war began with Operation Chengiz Khan's preemptive aerial strikes (india).

ð  on 16 December 1971 in Dhaka, marking the formation of East Pakistan as the new nation of Bangladesh.

ð  Officially, East Pakistan had earlier called for its secession from Pakistan on 26 March 1971.