The total cost of the Guadalcanal campaign to the American ground combat forces was 1,598 officers and men killed, 1,152 of them Marines. The wounded totaled 4,709, and 2,799 of these were Marines. Marine aviation casualties were 147 killed and 127 wounded. The Japanese in their turn lost close to 25,000 men on Guadalcanal, about half of whom were killed in action. The rest succumbed to illness, wounds, and starvation At sea, the comparative losses were about equal, with each side losing about the same number of fighting ships. The enemy loss of 2 battleships, 3 carriers, 12 cruisers, and 25 destroyers, was irreplaceable. The Allied ships losses, though costly, were not fatal; in essence, all ships lost were replaced. In the air, at least 600 Japanese planes were shot down; even more costly was the death of 2,300 experienced pilots and aircrewmen. The Allied plane losses were less than half the enemy's number and the pilot and aircrew losses substantially lower.
President Roosevelt, reflecting the thanks of a grateful nation, awarded General Vandegrift the Medal of Honor for "outstanding and heroic accomplishment" in his leadership of American forces on Guadalcanal from 7 August to 9 December 1942. And for the same period, he awarded the Presidential Unit Citation to the 1st Marine Division (Reinforced) for "outstanding gallantry" reflecting "courage and determination ... of an inspiring order." Included in the division's citation and award, besides the organic units of the 1st Division, were the 2d and 8th Marines and attached units of the 2d Marine Division, all of the Americal Division, the 1st Parachute and 1st and 2d Raider Battalions, elements of the 3d, 5th, and 14th Defense Battalions, the 1st Aviation Engineer Battalion, the 6th Naval Construction Battalion, and two motor torpedo boat squadrons. The indispensable Cactus Air Force was included, also represented by 7 Marine headquarters and service squadrons, 16 Marine flying squadrons, 16 Navy flying squadrons, and 5 Army flying squadrons.
