The Mirai finds itself in the middle of the Combined Fleet formation of the night before the Battle of Midway. First, Mirai is signaled by the Yamato, the Combined Fleet flagship, then two destroyers attempt to block its path, but it successfully eludes the Imperial Japanese fleet using superior acceleration from modern gas turbine propulsion. Reluctantly, the crew realizes that they have traveled sixty years into their past, to the eve of the Battle of Midway. They witness the battle but make the difficult decision to not become involved so as not to affect history. Captain Umezu decides that, since they obviously cannot enter Pearl Harbor to reprovision as originally planned, they should head back to Yokosuka and hope that they may encounter the anomaly again on the return trip.
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