Guadalcanal campaign
Sumiyoshi was told by Hyakutake's staff of the delay of the attack to 24 October. However, he was unable to contact his troops to tell them of the delay. Thus, at dusk on 23 October, two battalions of the 4th Infantry Regiment and the nine tanks of the 1st Independent Tank Company attacked on the U.S. Marine defenses at the mouth of the Matanikau.