In March and April 1942, Vandegrift was promoted to major general and assumed command of the First Marine Division. In May, the First Marine Division and the South Pacific Amphibious Force sailed for the South Pacific Area. The first Marine Division was the first Marine Corps division to ever leave the shores of the United States. On August 7, Vandegrift led the 1st Marine Division in the first large-scale offensive action against the Japanese, in the Solomon Islands. He was awarded the Navy Cross "for extraordinary heroism and distinguished devotion to duty as Commanding General of the First Marine Division and all ground troops action with enemy Japanese forces during the attack on the Solomon Islands 7 August 1942" (attack on Guadalcanal, Tulagi, and Gavutu); following that, he was awarded the Medal of Honor "for outstanding and heroic accomplishment above and beyond the call of duty as Commanding Officer of the First Marine Division in operations against enemy Japanese forces in the Solomon Islands during the period 7 August to 9 December 1942" (commanded the initial landings and the subsequent occupation ... that "resulted in securing a valuable base for further operations of our forces against the enemy") ... Vandegrift was presented the Medal of Honor on February 5, 1943, from President Franklin Roosevelt during a ceremony at the White House.