The Sepoy Rebellion was mainly a rebellion against the imposing rule of the British East Indian Company in India--which many local Indians felt was both economically and morally unfair. It led to a wide-spread British reorganization of the political and military institutions in India in an effort to have more of a solidified rule.
One of the greatest changes in the construction of the rifles that helped the americans during the revolutionary war was that the barrels were made longer, meaning that the rifles had more accuracy at longer ranges.
The answer would be Fredrick Douglas
I believe it is the safety pin