Siege of Boston
Most of the “Lobsterbacks” (as the colonials called the red-coated British troops) were bottled up in Boston, to which Washington’s forces laid siege. Try as they might, the British were unable to break out of their entrenchments. Then, when Washington arrayed his artillery on Dorchester Heights, British commanders gave the order to evacuate by sea in March 1776, reestablishing their headquarters at Halifax, Nova Scotia.