Complex sentence: While serving as an officer in Paistan military he revolted on the fateful night of 25th March 1971 & the punishment for sedition would have meant he would face a firing squad or the gallows if he was ever captured by the occupying forces.
Split into simpler sentences: While serving as an officer in Pakistan military he revolted on the fateful night of 25th March 1971. The punishment for armed rebellion would have meant either facing a firing squad or the gallows if he was ever captured by the occupying forces.