Answer: It effectively ended Japanese Naval Supremacy.
Explanation:
Before the Battle of Midway, the Japanese were a very formidable force in the Pacific. Their navy boasted of several aircraft carriers which allowed them to sink ships with planes and they used this to devastating effect against the Americans at Pearl Harbor and the Australians.
The Japanese knew that if they could capture Midway, they would get the opportunity to negotiate favorably with the Americans and the Americans knew they could not lose Midway due to its strategic location.
The Americans broke the Japanese code for the battle and figured out their plans and used this to inflict a heavy loss on the Japanese by sinking 4 of their aircraft carriers. The Japanese Navy never recovered from this and for the rest of the war, they were on the defensive.
They had signed a treaty. However they did very little to act in concert with one another during the war. Each country had different goals that did not mesh well enough to force them both to come together in formulating a combined strategy. They were referred to as the Axis Powers.
