After their initial daytime air losses, the Japanese relied on air attacks at night with only infrequent daylight bombings. One was mounted against the Rendova area on 20 July by 6 planes, one on 1 August by another 6 planes, and another on 7 August by a formation of 15 aircraft. Nightly harassing raids were made over the area by different planes and pilots all dubbed “Washing Machine Charlie.” Several larger flights were turned back by 90mm fire. Marines of Battery F, the searchlight battery, remained at their posts despite Japanese strafing, and radar men at their exposed, above ground posts remained at their stations throughout the raids, also. At dawn, after one all-night raid, a Battery C Marine was at the fuze pot stark naked, “he hadn’t had time to dress.” A total of 26 enemy planes were downed by battalion antiaircraft fire over Rendova. [Illustration: Marine Corps Historical Collection _The 9th Defense Battalion’s 90mm Group had four gun batteries, each with its own range-finder, computer, and radar. This weapons system continued in use through the war and into the 1950s. Note the “kill” flags stencilled on the barrel._] [Illustration: Marine Corps Historical Collection _The 9th Defense Battalion’s tank platoon lead by Capt Robert W. Blake supported the infantry attack. This vehicle is shown knocked out on top of a position at the Laiana water point. The Japanese bunker is all but indistinguishable from the debris that covered it._] [Illustration: _A tank crewman examines the damage to his vehicle which put it out of commission. The Japanese employed a mix of antitank weapons and individual close-in tactics to counter the light tanks. Because of the loss of 9th Battalion tanks in the drive on Munda, tanks of the 10th and 11th Defense Battalions’ armored platoons were fed in as replacements._ Marine Corps Historical Collection ] On 26 July 1943, the 9th’s tanks, reinforced by six others from the 10th Defense Battalion, led the assault on enemy positions near Lambetti Plantation. Tank operations were conducted over difficult terrain consisting of steep slopes, heavy underbrush, and closely spaced trees. The Japanese were in a strongly fortified defensive position, which consisted of a number of heavy bunkers and pillboxes in a clearing. In this action, which lasted approximately five hours, one of the tanks was disabled by a magnetic mine, and two men were killed and four wounded. A second assault on this position on 28 July by a battalion of infantry and four Marine tanks, was successful. Approximately 40 heavily fortified bunkers and pillboxes were destroyed and a large number of Japanese killed or wounded by tank fire. [Illustration: Department of Defense Photo (USMC) 60096 _Another defense battalion detachment went to Laiana, where this emplaced 40mm gun of 1stLt Colin J. Reeves’ battery merges with the dense jungle growth backdrop._] [Illustration: Department of Defense Photo (USMC) 57564