In 1937 Japanese planes attacked the American gunboat USS Panay in the Yangtze river. The Japanese apologized, claiming they hadn't seen the US markings on the ship. The Americans had however decrypted radio messages to the planes and they had been under orders while attacking the vessel and they knew it was an American ship. There was no mistake.
The US didn't act on this although this and the Allison Incident damaged US-Japanese relations. Suppose this evidence leaks and the US subsequently goes to war over the attack? What then? How does it effect WW2 for example.
The US didn't act on this although this and the Allison Incident damaged US-Japanese relations. Suppose this evidence leaks and the US subsequently goes to war over the attack? What then? How does it effect WW2 for example.