May 4, 1942, (Imo, March 20), the United States and Japan, the Coral Sea.

Coral Sea aircraft carrier group in the United States and Japan in the first clash in the Pacific, and the implementation of long-range attack both carrier-based aircraft, never use guns shooting each other. May 4, 1942, the U.S. military an aircraft carrier battle groups to the waters south of Tulagi Island, find F Japanese ship. A sunk by the Japanese destroyer, minesweepers 2 ferry and measures submarines a. 7th, the Japanese mobile formations south of the Coral Sea, dispatched 78 carrier aircraft attack, bombing of a U.S. destroyer. 93 pairs of U.S. carrier aircraft attack Japanese landing fleet and direct cover team immediately sank the Japanese light aircraft carrier. After Japanese setback to abort the attack. Naval warfare, both losses. Each one the Japanese loss of an aircraft carrier and destroyer, three small ships, two aircraft carriers were injured, the loss of the aircraft 80, 900 casualties; U.S. military also have aircraft carriers, destroyers and tankers sunk aircraft carrier injured fulfill, loss of aircraft 66 casualties 543 people. Since then, the aircraft carrier replaced the battleship in naval warfare.