
Japan surged. Then Midway flipped the Pacific.
A single battle halted the advance and reset momentum. Midway changed the direction of the war.World War II: Midway—When Codebreaking Turned the Tide

How the flip happened.
US forces had broken Japanese naval codes, knew the plan and the order of battle, and sprung the trap.World War II: Midway—When Codebreaking Turned the Tide