He formed the Rogers Rangers, a force of 600 New England frontiersmen who fought with great bravery in the French and Indian wars at Lake George (1758) and the capture of Quebec (1759). He served in the relief of Detroit in Pontiac’s Rebellion. His loyalty to the Revolution was questioned and Washington had him arrested as a spy in 1776. Such treatment converted him into a loyalist and in 1780 he went to live in London.