The Battle of Staten Island was a failed raid by Continental Army troops under Major General John Sullivan against British forces on Staten Island on August 22, 1777, during the American Revolutionary War. After British Lieutenant General William Howe sailed with most of his army from New York City in July, Sullivan recognized that the British position on Staten Island was vulnerable, and planned an attack. He carried it out in spite of commanding general George Washington's request that Sullivan reinforce the main army with his troops as soon as possible to support Washington's planned Colonial assault on British-held Philadelphia.