Conquering the mighty Persian empire and others and thus creating one of the largest empires ever. He was King of all Greek nations, Shah of Persia, Pharaoh of Egypt and ruler of many more lands.
According to George Washington the nation would have split up if it stayed a confederation.
The Battle of Trenton
Christmas 1776
"During one of the darkest moments of the American Revolution, Gen. George Washington led his army over the frozen Delaware River on the evening of December 25, 1776. The famous Crossing of the Delaware led to the Battle of Trenton and a string of victories that revived the cause."