Wondering about the first branch in the U.S. military

I'm doing a school project on the history of the U.S. military. Can anyone tell me which branch was actually established first?

The first branch established in the U.S. military is the Army. It was founded on June 14, 1775, during the American Revolutionary War. This makes it the oldest branch in the U.S. military. The Continental Congress established the Continental Army to coordinate military efforts among the Thirteen Colonies in their revolt against the rule of Great Britain. George Washington was appointed as commander-in-chief of the newly formed army, and he took control of the forces at Boston on July 3, 1775.