The raids on Lae and Salamaua, conducted by 104 planes from "Yorktown" and "Lexington" on 10 March 1942 proved devastating to the Japanese, causing heavy damage to their already depleted amphibious forces by sinking three transports and a minesweeper, as well as damaging a light cruiser, a large minelayer, three destroyers and a seaplane carrier. More importantly, the attack delayed the Japanese timetable for conquest in the Solomons and prompted them to send aircraft carriers to cover the operation. The delay, which also allowed the United States Navy time to marshal its forces, coupled with the dispatch of Japanese carriers led to the confrontation in the Coral Sea.