Countdown to Midway: 27 May 1942

JAPAN – Citing Japanese victories in the Coral Sea and other battles, Radio Tokyo the previous day announces that "America and Britain… have now been exterminated. The British and American fleets cannot appear on the oceans."

On board the new battleship, Yamato, a final round of planning and wargaming had wrapped on the 25^th, uncovering some potentially fatal flaws with Yamamoto’s plan – namely that there was a gap in the air search pattern south of the Hawaii/Midway axis which would prevent detection of American forces if they sortied to that area. Other officers were concerned that Nagumo’s forces were too far removed from the main body should additional support be required. However, Nagumo and his staff assured Yamamoto that they would be able to handle any such contingency, but another problem had arisen – namely that elements of Kido Butai would not be ready to sail on the established date.

Parshall & Tully note that Yamamoto declined to make changes in the operational schedule, believing that the tides at Midway would not accommodate Nagumo’s tardiness. Kido Butai would sail a day after the rest of the forces (invasion convoy and supporting force) and as such, would have one day less to knock out the island’s defenses for the invading force. No changes were made to the operational plan – no contingency plans put in effect. On the eve of departure for what the IJN leadership viewed to be the deciding battle, the battle that would utterly destroy the American fleet and end America’s presence in the Pacific, thereby securing the Greater East Asia Co-Prosperity Sphere, the planning and wargaming was almost a polar opposite of the tightly scripted, minutely detailed effort that led to the attack at Pearl Harbor.

Around the world, forces were joined and movement was afoot in this truly global war. In Russia, the 2^nd Battle of Karkhov was winding to a close. After initial Soviet successes and re-capture of the city, they now found themselves surrounded and an attempted breakout two days earlier had failed. Southward, in the Crimea, the Nazis have begun their summer offensive. In Africa, Rommel has undertaken an offensive against the British defensive positions at Gazala. In Britain, preparations are being made for the first thousand plane raid against Germany – American forces were just beginning to arrive under the command of Eighth Air Force, VIII Bomber Command, but would not see their first combat for another 2 months. In the China-Burma-India theater, 10th Air Force moved B-17’s of the 11th Bombardment Squadron (Heavy), 7th Bombardment Group (Heavy) from Karachi to Lahabad, India with B-17’s. And in the Southwest Pacific Theater, 5th Air Force B-17’s bomb the Japanese stronghold at Rabaul. 8th FG P-39s intercept Japanese fighters attacking Port Moresby, Australia losing two P-39F’s in the process. And at CINCPAC HQ, Ed Layton answers a question from Nimitz – name the dates and dispositions the enemy intends to take up around Midway: