During the upcoming Battle of Kwajalein at the beginning of February 1944, Brunelli was appointed commander of an Assault Landing Team (consisting of his battalion) in the capture of Namur Island. He landed on the beach on the morning of February 1 and after he found out, that only about sixty percent of his men had landed because of missing LVTs, Brunelli reorganized the available units and attacked the enemy's positions. He then led another attack, overrunning fortified and entrenched positions and subsequently repulsed a fanatical Japanese counterattack. Even though he was slightly wounded, Brunelli remained in command of the battalion and took part in the final assault to wipe out the last enemy resistance.