In 1932 Admiral Harry E. Yarnell launched a simulated carrier attack on Pearl Harbour, in almost exactly the same way as the actual Japanese attack 10 years later. Declared a total success by umpires, Yarnell warned of the vulnerability. Naval Intelligence knew Japanese writers reported on it.

Harry E. Yarnell Admiral Harry Ervin Yarnell (18 October 1875 – 7 July 1959) was an American naval officer whose career spanned over 51 years and three wars, from the Spanish–American War through World War II. Among his achievements was proving, in 1932 war games, that Pearl Harbor was vulnerable to a naval aerial attack. …

In 1932 Admiral Harry E. Yarnell launched a simulated carrier attack on Pearl Harbour, in almost exactly the same way as the actual Japanese attack 10 years later. Declared a total success by umpires, Yarnell warned of the vulnerability. Naval Intelligence knew Japanese writers reported on it. Read More »