From my brief look at that conflict, how the fight in East Pakistan was spilling over into India, millions? of refugees fleeing and that sort of thing that comp

From my brief look at that conflict, how the fight in East Pakistan was spilling over into India, millions? of refugees fleeing and that sort of thing that compelled them to act. That they could poke West Pakistan in the eye was just gravy, that this was a humanitarian action was incidental, sort of like Vietnam's intervention in Cambodia which put paid to the Khmer Rouge's extraordinary demoniacal regime. They didn't invade to do that, or have their National Guard equivalent give the PRC a drubbing, they did it to stop the Khmer Rouge from going across the (disputed) border and slaughtering their own people.