 Complete the following phrase:  Two weeks after Congress withdrew to safer Maryland, Washington crossed the ice-choked Delaware River about 30 miles upriver from Philadelphia on the night of December 2526, 1776. His approach over frozen trails surprised Hessian Colonel Johann Rall. The Continentals overwhelmed the Hessian garrison at Trenton, New Jersey, and took 900 prisoners. The celebrated victory rescued the American armys flagging morale, gave new hope to the Patriot cause, and dispelled much of the fear of professional Hessian mercenaries. Cornwallis marched to retake Trenton but was repulsed at the 