At night, a landing was made on W-Day, General Shepherd and each of his regimental commanders waited for the usual nightly Japanese counterattacks. The Japanese forces was led by Japanese Colonel Tsunetaro Suenaga of the 38th Regiment from the Imperial Japanese Army's 29th Division. At 2130, Colonel Suenaga probed his attacks at the juncture of the regimental boundaries between the 3rd Marine Division's 4th Marines and the Marine Brigade's 22nd Marines. The enemy charged in force and overran the forward Marine lines and began to penetrate the thinly held rear areas. Using grenades, small arms, mortars, bayonet and close quarters combat, they were able to hold of the attacking Japanese army.