What was the key to "Old Fox" Washington´s victories at Trenton and Princeton in the winter of 1776-1777?

Question

Quizplus · Accepted Answer

The key to Washington's victories at Trenton and Princeton was his use of the element of surprise. He led his troops across the Delaware River on a snowy Christmas night in 1776, catching the Hessian soldiers stationed in Trenton off guard and winning a decisive victory. His subsequent victory at Princeton only a few days later further boosted morale and proved his strategic prowess.

What Was the Key to "Old Fox" Washington´s Victories at Trenton