For five months, Japan's powerful carrier fleet, the "Kidō Butai", dominated the Western Pacific and Eastern Indian Oceans. Japan attacked with near impunity wherever she chose. This dominance ended abruptly in May 1942 when Allied naval forces, centered around aircraft carriers, frustrated Japanese amphibious invasion plans for Port Moresby, New Guinea during the Battle of the Coral Sea. The Allies sunk a light carrier but lost a fleet carrier in return. Each side also sustained heavy damage to another fleet carrier. The following month, the Allies sank four of Japan's six fleet carriers during the Battle of Midway at the cost of one American carrier. Two months after that, with air cover from American carriers, the Allies established a tenuous toehold on Guadalcanal at the southern end of the Solomon Islands. Both sides committed major troops and naval resources in their efforts to gain control of the island that neither side really wanted but could not afford to leave to the enemy. Opposing carriers fought major naval engagements over Guadalcanal, including carrier battles in the Eastern Solomon Islands and the Santa Cruz Islands. Overall combined losses for both sides during the Guadalcanal Campaign were 26,000 dead, three aircraft carriers sunk, four carriers heavily damaged, 67 other warships sunk, and 1,300 aircraft lost. As a result of these engagements, there were no operational Allied fleet or light carriers in the Pacific for a two-week period at the end of October 1942. Two such Japanese carriers were then operational but not engaged, in part because of the excessive loss of experienced pilots and supporting aircrews. Nonetheless, the Allies held Guadalcanal and the tide in the Pacific had decisively turned. For the rest of the war in the Pacific, the Allies maintained the strategic initiative.