November 10, 1775 is the celebrated birthday of the US Marines. After several attempts by the American colonies to work out some sort of reconciliation between the Crown and the American people, the Colonial Congress decided to take a sterner attitude. A committee of the Congress drafted a resolution to create a new military unit, called the Continental Marines.
Captain Samuel Nicholas This resolution was drafted in a popular Philadelphian inn called Tun Tavern, and was later approved by the entire legislative body. The owner of the tavern, Robert Mullan, was named a Marine Captain, and the owner of another tavern, Samuel Nicholas, was designated commandant of the Continental Marines.
It was celebrated after the 1st World War. before then, they celebrated a variety of days, to include when the Marines were reestablished after the Revolutionary War, and when the Marines were Separated from the Army.
All that is true. The Marines were also dis-established after that, to save a bit of money.