One of the indirect consequences of World War II was the rapid expansion of Australian infrastructure. American, British and Australian war plans all assumed that the defensive line would be held at Singapore and the Dutch East Indies, and that the bulk of the fighting would occur in the Central and North Pacific regions. When the line was broken, thousands of troops and millions of pounds of war material had to be rerouted through Australia, which did not have the capacity to handle the sudden growth. Construction was soon underway and formerly quiet Australian cities expanded to accommodate Allied soldiers training for war. This undated map shows the extent of the projects.