Anticipating that the Japanese would strike at Port Moresby again, the garrison was strengthened and MacArthur ordered the establishment of new bases at Merauke and Milne Bay to cover its flanks. The Battle of Midway in June 1942 led to consideration of a limited offensive in the Pacific. MacArthur's proposal for an attack on the Japanese base at Rabaul met with objections from the Navy, which favored a less ambitious approach, and objected to an Army general being in command of what would be an amphibious operation. The resulting compromise called for a three-stage advance. The first stage, the seizure of the Tulagi area, would be conducted by the Pacific Ocean Areas, under Admiral Chester W. Nimitz. The later stages would be under MacArthur's command.