Victory at Boston Washington assumed command of the Continental Army in the field at Cambridge, Massachusetts in July 1775, during the ongoing siege of Boston. Realizing his army's desperate shortage of gunpowder, Washington asked for new sources. American troops raided British arsenals, including some in the Caribbean, and some manufacturing was attempted. They obtained a barely adequate supply (about 2.5 million pounds) by the end of 1776, mostly from France.[61] Washington reorganized the army during the long standoff, and forced the British to withdraw by putting artillery on Dorchester Heights overlooking the city. The British evacuated Boston in March 1776 and Washington moved his army to New York City.
Although highly disparaging toward most of the Patriots, British newspapers routinely praised Washington's personal character and qualities as a military commander. These articles were bold, as Washington was enemy general who commanded an army in a cause that many Britons believed would ruin the empire.[62] Defeat at New York City and Fabian tactics In August 1776, British General William Howe launched a massive naval and land campaign designed to seize New York. The Continental Army under Washington engaged the enemy for the first time as an army of the newly independent United States at the Battle of Long Island, the largest battle of the entire war. The Americans were badly outnumbered, many men deserted, and Washington was badly beaten. Subsequently, Washington was forced retreat across the East River at nighttime. However, he did so without the loss of a single life or material.[63] Washington retreated north from the city to avoid encirclement, enabling Howe to take the offensive and captureFort Washington on November 16 with high Continental casualties. Washington then retreated across New Jersey; the future of the Continental Army was in doubt due to expiring enlistments and the string of losses.[64] On the night of December 25, 1776, Washington staged a comeback with a surprise attack on a Hessian outpost in western New Jersey. He led his army across the Delaware River to capture nearly 1,000 Hessians in Trenton, New Jersey. Washington followed up his victory at Trenton with another over British regulars at Princeton in early January. The British retreated back to New York City and its environs, which they held until the peace treaty of 1783. Washington's victories wrecked the British carrot-and-stick strategy of showing overwhelming force then offering generous terms. The Americans would not negotiate for anything short of independence.[65] These victories alone were not enough to ensure ultimate Patriot victory, however, since many soldiers did not reenlist or deserted during the harsh winter. Washington and Congress reorganized the army with increased rewards for staying and punishment for desertion, which raised troop numbers effectively for subsequent battles.[66]
Washington rallying his troops at the Battle of Princeton Historians debate whether or not Washington preferred a Fabian strategy[67] to harass the British, with quick shark attacks followed by a retreat so the larger British army could not catch him, or whether he preferred to fight major battles.[68] While his southern commander Greene in 1780-81 did use Fabian tactics, Washington, only did so in fall 1776 to spring 1777, after losing New York City and seeing much of his army melt away. Trenton and Princeton were Fabian examples. By summer 1777, however, Washington had rebuilt his strength and his confidence and stopped using raids and went for large-scale confrontations, as at Brandywine, Germantown, Monmouth and Yorktown.[69]