The Battle of Concord and Lexington in 1775 saw British troops clash with Massachusetts militia. Paul Revere and William Dawes rode through the night to warn the towns that the British were marching from Boston to Concord. The next morning, the first shots were fired as the British troops encountered militia members in Lexington. Though outnumbered, the British continued on to Concord but faced growing militia forces as word spread. Under pressure, the British retreated back to Boston after clashing with militia at Concord's North Bridge.