In which war in North America did the Rogers' Rangers fight?

Rogers' Rangers were skilled woodsmen who fought for the British during the French and Indian War. They frequently undertook winter raids against French outposts, blended native-American techniques with pioneering skills and operated in terrain where traditional militias were ineffective.

The American ranger tradition actually began back in the early 17th century on the frontier, They would 'range' between one post and another, were usually full-time soldiers drawn from the militia and paid by colonial governments to patrol between frontier posts and look for Indian signs to provide early warning of hostile Indian intent.

When the French and Indian War began, Capt. Robert Rogers of New Hampshire recruited frontiersmen in 1755 for companies that could support the British Army by conducting long-range patrols through the wilderness in all weather and difficult terrain to gather intelligence, take prisoners, or conduct raids.

The Rangers also attacked the villages of hostile Indians such as the Abenakis, in retribution for raids against settlements. Later Rogers moved the Rangers west to capture Fort Detroit for the British, along with a number of other French posts on the Great Lakes.

When the American Revolution broke out in 1775, some colonial militia units were led by veterans of Rogers' Rangers.