Question: when did the battles of lexington and concord happen?
Answer: April 19 , 1775

The Battles of Lexington and Concord were the first military engagements of the American Revolutionary War . The battles were fought on April 19 , 1775 in Middlesex County , Province of Massachusetts Bay , within the towns of Lexington , Concord , Lincoln , Menotomy ( present - day Arlington ) , and Cambridge . They marked the outbreak of armed conflict between the Kingdom of Great Britain and its thirteen colonies in America .