North Western Area Campaign

The North-Western Area Campaign was an air campaign fought between the Allied and Japanese air forces over northern Australia and the Netherlands East Indies (NEI) between 1942 and 1945. The campaign began with the Japanese bombing of Darwin on 19 February 1942 and continued until the end of the war.

While the Japanese attack on Darwin inflicted heavy damage on the Royal Australian Air Force (RAAF) base there, the Allies quickly recovered. Darwin was reinforced to meet the perceived threat of invasion and additional airfields were built to the south of the town. By October 1942 the RAAF's North-Western Area Command had been built up to six squadrons, and was conducting daily attacks on Japanese positions in the NEI.

The Allied force continued to expand in 1943 with the arrival of United States Army Air Forces B-24 Liberator heavy bomber units, Australian and British Spitfire squadrons and Australian and Dutch medium bomber squadrons. The Spitfires inflicted substantial losses on Japanese raiders as North-Western Area stepped up its attacks on Japanese positions. RAAF Catalina flying boats also successfully laid mines in Japanese shipping routes.