The American colonies leading up to the American Revolution were largely rural with few large cities. Main roads connected port towns and important places in New England. After the Boston Tea Party, the British sent more troops to enforce new laws, leading colonial militias to prepare for war. The Revolutionary War began with the Battles of Lexington and Concord in 1775, where American militiamen fought British troops. This led the Second Continental Congress to form the Continental Army under George Washington.