Battle of Midway (1942)
Six months after the attack on Pearl Harbor, the United States Navy dealt Imperial Japan its first major naval defeat at Midway Atoll. The four-day battle — from June 4 to 7, 1942 — destroyed four of Japan's front-line aircraft carriers and killed most of their elite aviators, a loss from which the Imperial Navy never recovered.
The Setup: Codebreakers vs. Yamamoto
After their stunning victory at Pearl Harbor and a string of conquests across Southeast Asia and the Pacific, the Japanese high command debated their next strategic move. Admiral Isoroku Yamamoto, architect of Pearl Harbor, pushed for an attack on Midway Atoll — a tiny but strategically vital island about 1,300 miles northwest of Honolulu. His plan was to capture Midway and use the assault as a lure to draw out the remnants of the US Pacific Fleet, particularly its aircraft carriers, for a decisive engagement. What Yamamoto did not know was that US Navy codebreakers at Station HYPO in Pearl Harbor, led by Commander Joseph Rochefort, had largely cracked the Japanese naval code JN-25. They deduced that the target designated "AF" was Midway by arranging a deliberate leak claiming Midway's water distillation plant had broken down. Japanese radio traffic soon confirmed the ruse by referencing "AF" as having a water problem. Admiral Chester Nimitz, commanding the Pacific Fleet, prepared an ambush.
Did You Know?
The USS Yorktown, badly damaged at the Battle of the Coral Sea just a month earlier, was patched up by 1,400 workers in just 72 hours at Pearl Harbor — a repair job originally estimated at 90 days. She sailed to Midway and played a critical role before being sunk by a Japanese submarine.
Four Carriers Lost in a Single Morning
On the morning of June 4, Japanese aircraft launched strikes against Midway's installations. But American dive bombers from USS Enterprise and USS Yorktown arrived at a devastating moment: the Japanese carrier decks were crowded with refueling and rearming aircraft. In just five minutes of attacks shortly after 10 AM, three Japanese carriers — Akagi, Kaga, and Soryu — were set ablaze and doomed. A fourth, Hiryu, launched counterattacks that badly damaged the Yorktown, but American aircraft found and fatally struck Hiryu that afternoon. All four carriers — representing Japan's elite naval air power — sank within hours of each other. The United States lost the Yorktown (sunk by a Japanese submarine June 7) and 307 men. Japan lost 3,057 sailors and airmen, along with hundreds of irreplaceable trained aviators.
Turning Point of the Pacific War
Midway is often called the turning point of the Pacific War, and with good reason. Japan had entered the battle with four fleet carriers; it left with none. The loss of so many skilled pilots — trained over years, not months — proved impossible to replace at the rate demanded by industrial warfare. After Midway, Japan shifted permanently to a defensive posture. The United States, meanwhile, began the island-hopping campaign that would eventually bring American air power within striking distance of the Japanese home islands. The battle vindicated the value of signals intelligence and carrier-based aviation, reshaping how the US Navy would fight for the rest of the war.