Battle of Sio

Battle of Sio
The Battle of Sio, fought between December 1943 and March 1944, was the break-out and pursuit phase of General Douglas MacArthur's Huon Peninsula campaign, part of the New Guinea campaign of World War II. Following the defeat of the Japanese in the Battle of Sattelberg, Australian Army forces broke through positions around Finschhafen. Constant pressure from US Navy PT boats, Australian land forces and Allied aircraft brought the Japanese logistical system to the brink of collapse, resulting in disease, malnutrition and privation for the Japanese soldiers. Australian and Papuan troops advanced along the coast, employing infantry, tanks, and air strikes against the Japanese positions, which were generally sited at creek crossings in the jungle. The Australian and Papuan troops inflicted heavy and disproportionate casualties on the Japanese as they advanced, ultimately linking up with the American forces at Saidor. Australian troops were also able to capture important Japanese cryptographic materials. Hundreds of Japanese soldiers were killed; thousands more died from disease, malnutrition, exhaustion and suicide.