Sawyer saw service during the American Revolution, the French Revolutionary War, the War of 1812 and the Napoleonic Wars. He eventually rose to the rank of Admiral.Rear-Admiral Sir Richard BICKERTON (1st Baronet, 1727-1792) was a Naval Officer who finished his career as a rear admiral in the Royal Navy and was ennobled as the first Baronet Bickerton of Upwood. He served in several naval engagements, and died Commander-in-Chief, Plymouth in 1792.