Balikpapan was one of the most fought-over pieces of real estate in the Pacific War, changing hands twice — captured by Japan in January 1942 and retaken by Australian forces in July 1945 in one of the last major amphibious operations of the war. The city has several monuments and memorials commemorating both the Allied and civilian losses, as well as remnants of Japanese defensive positions.
The main memorial at Kampung Baru commemorates the Allied forces who fought to retake the city. The Dutch colonial oil infrastructure, which brought the Japanese to Balikpapan in the first place, is referenced throughout the city's history. The current oil industry, which still dominates the economy, is a direct descendant.