The Battle of Midway was significant because it marked the end of C - the Japanese eastward advance in the Pacifc. By many, the Battle of Midway seems to have been the decisive victory which ould men needed at the time.
The Japanese Navy had been advancing easily for years in the Pacific. Their attempt to take Midway in June of 1942 was due to the tiny island’s importance as a refueling port and airstrip for the United States. The American victory there marked the end of the Japanese eastward advance in the Pacific by their Navy.