Major Robert Rogers

Robert Rogers (1731 - 1795),  Rogers Rangers, founding forefather of  US Rangers special forces was a highly decorated American born hero of the French and Indian War as  frontiersman / soldier. Rogers a brave and capable leader, who led from the front inspiring courage and loyalty from his men. He got a full officer commission in the regular British army (George Washington failed to do this), accepted the French surrender at Fort Detroit was made governor of a territory in Michigan. 

Unfortunately,  a wild card with little respect for authority, a reputation for drinking / gambling and a duplicitous reputation. This cost him his position and saw him spend time in jail in England, where he stayed for many years trying to clear his name.

During the American Revolution, he was not trusted by the Patriots and fought for the British. Alcohol consumption hampered him, losing his command early in war. 

Ended his days in drunken poverty in London