John S. Thach was born in Pine Bluff, Arkansas. He graduated from the United States Naval Academy in 1927 and spent two years serving in battleships before training as a Naval Aviator in 1929. Thach spent the next decade serving as a test pilot and instructor and establishing a reputation as an expert in aerial gunnery.
In the early 1940s he was placed in command of Fighting Squadron Three and developed a fighter combat tactic known as the Thach Weave. This tactic enabled US fighter aircraft to hold their own against the superior Mitsubishi Zero, the primary fighter of Japan.
Lieutenant Commander Thach and Fighting Squadron Three flew off of USS Lexington (CV-2) in the early part of World War II and was assigned to Yorktown (CV-5) during the Battle of Midway in June of 1942.
After Midway Thach was assigned to instruct other pilots in combat tactics. The US Navy pulled its best combat pilots out of action to train newer pilots while the Japanese kept their best pilots flying. As the war progressed the Japanese Navy lost experienced their experienced pilots due to attrition and had no well trained replacements.
Later in the war Commander Thach became Operations Officer to Vice Admiral John S. McCain, Sr, commander of the Fast Carrier Task Force. Thach was present at the formal Japanese Surrender on 2 September 1945 in Tokyo Bay.
Thach commanded Sicily (CVE-118) during the Korean War and Franklin D. Roosevelt (CVA-42) in 1953-1954. He was promoted to Admiral in 1955.
In 1958 and 1959 Thach was placed in command of an antisubmarine development unit, with Valley Forge (CVS-45) serving as his flagship.
Admiral Thach was on the cover of the 1 September 1958 edition of Time Magazine.
Admiral Thach was Commander in Chief, U.S. Naval Forces, Europe, starting in 1965. Thach retired from the United States Navy in May of 1967. He died in 1981.
The frigate Thach (FFG-43) was named in his honor.