On the 4th of June 1942, 75 years ago, the Battle of Midway.
After the Doolittle Raid on April 18th, Japan felt the urge to expand its security perimeter more eastward. Admiral Yamamoto therefore planned an attack on the Midway Atoll, where a US military base and airfield were established, the westernmost outpost of American Forces in the Pacific then. Capturing Midway would make Hawaii, some 2100 km more east, vulnerable for conquest. So, Yamamoto reasoned, the US would do everything to defend it. He then hoped to draw the American carrier forces into a decisive naval battle.
But the American cryptanalysts had broken the Japanese code and discovered the plan. The US Navy dispatched three fleet carriers (USS Yorktown, USS Hornet and USS Enterprise) to Midway.
In the preparations to the battle, the Japanese Navy neglected however good reconnaissance. So they remained too long unaware of the whereabouts of the US carriers.
In the morning of June 4th, Admiral Nagumo, commander of the Japanese operations, launched an air raid on Midway. He kept a reserve group on his carriers with armor piercing bombs and torpedoes, in case carriers should show up.
When the air raid was over, Nagumo got the message that the air strip on Midway was still intact, and a second raid was needed. Since there were still no enemy carriers spotted, he ordered to rearm his reserve for land bombing.
Coincidentally, when the conversion was finished, two things happened simultaneously. The planes returned from Midway, short of fuel and so eager to land. Secondly, a reconnaissance plane sent a message that a US carrier had been spotted, northeast of Midway. Nagumo decided to have his planes landed, while the reserve was again rearmed for attacking ships. Ultimately, he would send his whole air fleet to attack the enemy carrier.
Meanwhile, his ships got under attack by US planes from Midway and from the carriers. All attacks were repulsed, but the Japanese had no radar and relied for their protection entirely on a cover of zeros. The multiple attacks on the Japanese carriers had however dispersed this air cover completely. So, the approach of two dive bomber groups over the Japanese carriers remained unnoticed. They were not spotted than when the outlooks on the ships heard the howling sound of dive bombers coming down.
The attack took place just when the massive air fleet stood ready for takeoff on the decks. During the rapid armament changes, little priority had been given to safety and securing ammunition. The bombs fell amidst the lined up planes and caused an inferno on Akagi, Kaga and Soryu.
The fourth Japanese carrier, Hiryu, was out of sight during the attack. Its planes made two attacks on the USS Yorktown, causing severe damage. Finally, the Hiryu would also be knocked out by US bombers. All four Japanese carriers would sink, as would ultimately do the Yorktown.
Midway stopped the Japanese expansion. The Japanese Navy would never recover from the loss of four carriers and of experienced pilots. It is considered as the turning point in the war in the Pacific, and as one of the most decisive naval battles ever in history.