Depends who and what he did. We need more details to answer this
Answer:
a young officer on Washington's staff who captured a British fort during the Battle of Yorktown
Explanation:
Alexander Hamilton was the commander of an infantry during the Siege of Yorktown and was successful in military missions.
One of his most well known military victories was the Yorktown battle where he defeated the enemy and unhooked their bayonets and because of this victory, American independence would hold two years later.
Therefore the best way to describe Alexander Hamilton is to say that a young officer on Washington's staff who captured a British fort during the Battle of Yorktown.
Because they both had to cross a border to get here........you may have to be more specific on the question for me to answer it