Hancock served in Congress through some of the darkest days of the Revolutionary War. The British drove Washington from New York and New Jersey in 1776, which prompted Congress to flee to Baltimore, Maryland. Hancock and Congress returned to Philadelphia in March 1777 but were compelled to flee six months later when the British occupied Philadelphia. Hancock wrote innumerable letters to colonial officials, raising money, supplies, and troops for Washington's army. He chaired the Marine Committee, and took pride in helping to create a small fleet of American frigates, including the USS "Hancock", which was named in his honor.