Complex sentence: During the Revolutionary War, John Scott served under George Washington in the New York and New Jersey campaign as a brigadier general, commanding the 1st New York Independent Battalion, the 2nd New York County Battalion, and several New York Militia Regiments.
Split into simpler sentences: During the Revolutionary War, John Scott served as a brigadier general under George Washington in the New York and New Jersey campaign. He commanded the 1st New York (Independent) Battalion, the 2nd New York (County) Battalion, and several New York Militia Regiments.