[There] was a blockhouse constructed of reinforced concrete approximately three feet thick. It had three gunports, one each facing north, east, and west, another indication of the enemy’s mistaken assumption that the Americans would attack from the sea rather than the lagoon shore. Two heavy hits had been made on the blockhouse, one apparently by 14-inch or 16-inch shells and the other by an aerial bomb. Nevertheless, the position had not been demolished.... [The battalion commander, Lieutenant Colonel Edward J. Dillon] then ordered Company G to take the blockhouse. The company commander first sent forward a 75mm halftrack, which fired five rounds against the steel door. At this point a demolition squad came up, and its commander volunteered to knock out the position with explosives. While the halftrack continued to fire, infantry platoons moved up on each flank of the installation. The demolition squad placed charges at the ports and pushed bangalore torpedoes through a shell hole in the roof.... “Cease fire” was then ordered, and after hand-grenades were thrown inside the door, half a squad of infantry went into investigate. Unfortunately, the engineers of the demolition squad had not got the word to cease fire, and had placed a shaped charge at one of the ports while the infantry was still inside. Luckily, no one was hurt, but as the company commander reported, “a very undignified and hurried exit was made by all concerned.” Inside were three heavy machine guns, a quantity of ammunition, and the bodies of three Japanese. [Illustration: Department of Defense Photo (USMC) 70241 _One of the very few Japanese finally persuaded to surrender in the Roi-Namur operation, this stripped-down soldier is well covered by suspicious Marine riflemen as he leaves his hiding place in a massive but shell-shattered blockhouse._] Many Japanese had to be flushed out of or blown up in the airfield’s drainage ditches and culverts, but by 1800 that day, D plus 1, Roi had been secured. (“Secured” seemed a somewhat flexible term when the first service of Mass, held the next day, was interrupted by Japanese shots.) By 6 February, however, the ground elements of a Marine aircraft wing were ensconced at the airfield, preparing for the arrival of their planes in five more days. For the entire remainder of the war these planes pounded the by-passed atolls with such power that the Japanese on them were eliminated from any further role in the war. (There was one surprise Japanese air raid on Roi, staged from the Mariana Islands, on 12 February. This caused a number of casualties and major damage to material.) [Illustration: _Marine tanks and infantry worked effectively together when the terrain permitted._ Department of Defense Photo (USMC) 70203 ]