Promoted to captain on 29 May 1745, Buckle was given command of the third-rate HMS "Russell" in 1748, the fourth-rate HMS "Assistance" in 1749 and the sixth-rate HMS "Unicorn" in 1753.
Promoted to captain on 29 May 1745, Buckle was given command of the third-rate HMS "Russell" in 1745 and took part in the action of 17 July 1761. The also commanded the fourth-rate HMS "Assistance" in 1749 and the sixth-rate HMS "Unicorn" in 1753.