In the meantime, a British fleet met de Grasse in action off Chesapeake Bay and after some mutual damage returned to New York for repairs, leaving the French in command of the waters off Yorktown. Cornwallis was now blocked by land and sea. A desperate effort to break out in rowboats across the York River was frustrated by a storm. His only hope was return of the British fleet with help from New York. The fleet did not come. The allied army of some 9000 Americans and nearly 8000 French moved forward against the Yorktown redcoats.
