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Getty Images Alexander Hamilton is known for many things — he was the prolific writer behind the Federalist Papers, the first secretary of the treasury, the creator of the U.S. Coast Guard, and the inspiration for one of Broadway’s biggest musicals. What’s less celebrated about Hamilton is his military career, though when fighting broke out, the eager immigrant from Nevis island in the Caribbean joined the cause. On March 14, 1776, Hamilton was named captain of the New York Provincial Company of Artillery, and soon fought in the battles at Kip’s Bay and White Plains, among others. Hamilton slowly climbed up the military ladder, first serving as General George Washington’s aide and then as commander of a light infantry battalion at the decisive Battle of Yorktown. However, it’s his original artillery company that holds a singular distinction. Known today as 1st Battalion, 5th Field Artillery Regiment, Hamilton’s former artillery unit is one of the oldest active regiments still serving in the U.S. Army.