The turning of the tide came in early May, during the Battle of the Coral Sea, which proved the first strategic victory of the Allies against Japanese expansion. This was followed one month later by the Battle of Midway, in which the US Navy defeated an attacking Japanese fleet, inflicting devastating damage on the attacking force. The Battle of Midway is widely considered the most important naval battle of the Pacific Campaign and has even been described as "the most stunning and decisive blow in the history of naval warfare" The reasons usually given for the resounding victory are Japanese overconfidence in their own forces, poor planning and the intercepting of Japanese battle plans by the United States. The losses suffered during this Battle of Midway, paired with the campaign of attrition that was taking place in Solomon Islands, left Japan unable to replenish its forces and turned the tides of war against it. By August 1942, the Allied forces were on the offensive, earning victories in the New Guinea campaign at Guadalcanal, Milne Bay and Buna-Gona.