 Complete the following phrase:  As a commodore, he was deployed to the North American Station, to provide naval support for an expedition led by General Sir Henry Clinton reinforcing loyalists in the Southern Colonies at an early stage of the American Revolutionary War. He led a naval attack against the fortifications on Sullivans Island later called Fort Moultrie after their commander, protecting Charleston, South Carolina. However, after a long and hard-fought battle, Parker was forced to call off the attack, having sustained heavy casualties, including the loss of a ship. He subsequently served under Lord Howe in the 