 In Princeton itself , Brigadier General John Sullivan encouraged some British troops who had taken refuge in Nassau Hall to surrender , ending the battle . After the battle , Washington moved his army to Morristown , and with their third defeat in 10 days , the British evacuated southern New Jersey . With the victory at Princeton , morale rose in the American ranks and more men began to enlist in the army . The battle ( while considered minor by British standards ) was the last major action of Washington 's winter New Jersey campaign . 
