 Complete the following phrase:  Morobe province was a key campaign site during World War II. The Japanese had established strong supply bases in the towns of Lae and Salamaua in 1942. The Salamaua-Lae campaign of the following year was a series of actions in which the Australian and United States forces sought to capture the two Japanese bases. The campaign to take the area began with the Australian attack on Japanese positions near Mubo, on 22 April 1943 and ended with the fall of Lae on September 16, 1943, in Operation Postern. The campaign was notable not only for its classic defense maneuvers at the 