Well since the u-boats took out many allied patrols and shipments it made it harder for the allies to ship goods to England and other allies in the time of need....
The French Revolution was a period of major social upheaval from 1787-1799. It completely changed the relationship between the rulers and the people whom they governed to redefine the political power. The French Revolution started because of a widespread of discontent with the French monarchy. The revolution came to an end when General Napoleon overthrew the Revolutionary Government and established the French Consulate. General Napoleon became the leader.
You do know you could easly look that upXD