If the course of events had been different by just three hours, the last battleship-versus-battleship fight in history would have been an engagement between vessels of the two biggest battleship classes ever completed: the Japanese superbattleship Yamato and the American Iowa-class battleships Iowa and New Jersey. That’s the margin of time by which Admiral Kurita’s Center Force and Admiral Halsey’s Task Group 34.5 missed each other in the closing stages of the Battle of Leyte Gulf, in the early hours of October 26, 1944. The Japanese Center Force – consisting of Yamato and three other battleships, plus several cruisers and destroyers – was sailing north towards San Bernardino Strait following the Battle of Samar. The American TG 34.5 – consisting of Iowa and New Jersey, and escorted by a few cruisers and destroyers – had been detached by Halsey from Task Force 34 (which was engaged in the Battle of Cape Engaño) and was sailing south towards San Bernardino Strait. The Americans got there just three hours after Kurita had escaped through the Straight. So instead of an epic clash between the Yamato and the Iowa / New Jersey pair, the last dreadnought-versus-dreadnought engagement in history actually ended up being the Battle of Surigao Strait, which was fought a few hours before the start of the Battle of Samar.
By adding a couple of extra might-have-beens to this scenario, we get an even more interesting situation. The brand-new Iowa-class battleship Wisconsin arrived at Ulithi (in the Caroline Islands) on December 9, 1944, and on that date joined Halsey’s 3rd Fleet. Her equally new sister ship Missouri arrived at Ulithi on January 13, 1945. Had both vessels reached the western Pacific just a few weeks earlier, they could very well have been operating alongside Iowa and Jew Jersey during the Battle of Leyte Gulf. On the Japanese side, Kurita’s Center Force had originally included both of the Yamato-class battleships: Yamato and Musashi. The latter ship, however, had been sunk by US carrier planes at the Battle of the Sibuyan Sea, one day before the Battle of Samar. So: if Musashi hadn’t been sunk on the 24th, if Wisconsin and Missouri had joined Halsey a couple of months ahead of schedule, and if TG 34.5 had intercepted Kurita’s Center Force instead of missing it by three hours, the result would have been a slugfest between two Yamato-class battleships and four Iowa-class battleships.