Japanese troops landed and occupied Lae and Salamaua in north-eastern Papua on 8 March 1942. In an elaborate operation scheduled for early May, the Japanese planned a seaborne invasion of Port Moresby to safeguard their positions in New Guinea and in the Rabaul area, to provide a base that would bring northern Australia within range of their warships and bombers, and to secure the flank of their projected advance towards New Caledonia, Fiji and Samoa.