One cause of washingtons victory at the battle of Trenton

General George Washington’s army crossed the icy Delaware on Christmas Day 1776 and, over the course of the next 10 days, won two crucial battles of the American Revolution. In the Battle of Trenton (December 26), Washington defeated a formidable garrison of Hessian mercenaries before withdrawing. A week later he returned to Trenton to lure British forces south, then executed a daring night march to capture Princeton on January 3. The victories reasserted American control of much of New Jersey and greatly improved the morale and unity of the colonial army and militias.

He had spies in the British troops