 From there they were sent to Guadalcanal.By September 4 the bulk of the Kawaguchi Force (including the Aoba Detachment's three infantry battalions from the 2nd Division) had landed on Guadalcanal.On the night of the September 13 Kawaguchi's forces, involving the main force of the Kawaguchi Detachment (about five infantry battalions) and the remainder of the Ichiki Detachment (about 100 men), assaulted the U.S. Marine defenses around Henderson Field.