Washington quickly organized his army into three “grand divisions,” each commanded by a major general and composed of two brigades, typically with six regiments apiece. Ward led the division on the right wing, around Boston Neck. Putnam commanded the center, at Cambridge. The division on the left wing, overlooking Bunker Hill and ruined Charlestown, was led by Charles Lee, a brusque, vivid eccentric who had spent a quarter century in the king’s service before immigrating to America in 1773.