BUNKER HILL, BATTLE OF

(June 17, 1775), one of the most important colonial victories early in the U.S. War of Independence. Fought during the Siege of Boston, it lent considerable encouragement to the revolutionary cause. Within two months after the battles of Lexington and Concord (April 19, 1775), more than 15,000 troops from Massachusetts, Connecticut, New Hampshire, and Rhode Island had assembled in the vicinity of Boston to stop the British army of 5,000 or more stationed there. General Artemas Ward, commander in chief of the Massachusetts troops, served as senior New England officer. There were two obvious points from which Boston was vulnerable to artillery fire: Dorchester Heights, and two high hills, Bunker's and Breed's, in Charlestown (now part of Boston), about a quarter of a mile across the Charles River from the north shore of Boston. By the middle of June, hearing that British general Thomas Gage was about to occupy one of the hills, the colonists decided to fortify it. By the time they were discovered, Colonel William Prescott and his men had completed a redoubt atop Breed's Hill (now commonly called Bunker Hill). Despite a cannonade from British men-of-war in the harbour and from a battery across the river in north Boston, the colonists continued to strengthen their position. Gage then dispatched about 2,300 troops under Major General William Howe against Prescott. Landing without opposition under artillery protection, the British were stopped by heavy fire from the colonial troops barricaded behind rail fences that had been stuffed with grass, hay, and brush. On the second or third advance, however, the attackers carried the redoubt and forced the surviving defenders, mostly exhausted and weaponless, to flee. Casualties numbered around 1,000 British and about 450 American soldiers. If the British had followed this victory with an attack on Dorchester Heights to the south of Boston, it might have been worth the heavy cost. But, presumably because of their severe losses and the fighting spirit displayed by the rebels, the British commanders abandoned or indefinitely postponed such a plan. Consequently, after General George Washington, who took colonial command two weeks later, had collected enough heavy guns and ammunition to threaten Boston, he was able in March 1776 to seize and fortify Dorchester Heights and compel the British to evacuate Boston and the harbour. Also, the losses inflicted on the British in the Battle of Bunker Hill bolstered the Americans' confidence.