In the second action between 6 and 9 October a larger force of Marines successfully crossed the Matanikau River , attacked newly landed Japanese forces from the 2nd Infantry Division under the command of generals Masao Maruyama and Yumio Nasu , and inflicted heavy losses on the Japanese 4th Infantry Regiment .
In the second attack between 6 and 9 October a larger force of Marines crossed the Matanikau River , attacked newly landed Japanese forces from the 2nd Infantry Division under the command of generals Masao Maruyama and Yumio Nasu . The Marines inflicted caused a lot of deaths and wounding for the Japanese 4th Infantry Regiment .