In response to these potential threats, Operation Toenails, landings in the New Georgia Islands in the Central Solomons with the capture of Munda as the primary objective, were planned, scheduled, and mounted. The first step leading to the invasion of New Georgia was the occupation of the Russell Islands, 65 miles northwest of Guadalcanal, which would serve as a forward base on which airfields would be constructed. Operation Cleanslate on 21 February 1943 saw the Marine 3d Raider Battalion (Lieutenant Colonel Harry B. Liversedge) land on Pavuvu, and the 43d Infantry Division (less a regimental combat team) invade Banika. Both landings were unopposed. The 11th Defense Battalion landed on Banika the same day and had its guns in place by noon. By 15 April, Allied aircraft began operating from the first of two new airstrips the Seabees constructed on Banika. The primary objective of Operation Toenails was the capture of the airfield on Munda in the New Georgia group. Preliminary landings to support the main effort were to be made at Wickham Anchorage on Vangunu Island, Viru Harbor, and the Bairoko Harbor areas of New Georgia. Rendova Island and smaller islands nearby, across Blanche Channel to the south of New Georgia, were to be occupied next and used as supply bases and also as artillery positions for delivering supporting fire for the main attack on Munda. The plan called for ground forces then to drive the Japanese into the Munda Point area and once they were there, Allied air, artillery, and tanks could support the main landing. The enemy “would be annihilated or forced into a costly withdrawal,” according to the Allied concept of the operation.