Chapter 11 takes us to the edges of the Pacific archipelago for a closer look at the camps for Japanese Surrendered Personnel and the War Crimes Trials Compounds in the Australian-administered island territories of New Guinea. The chapter traces their changing accommodation in underground tunnels, timber barracks and Quonset huts. The War Criminals Prison at Manus Island precedes the later location there of the infamous offshore detention center, one of many such facilities later created for incarcerating unauthorized asylum seeker arrivals to Australia. The chapter makes the case for a genealogical approach to physical sites of incarceration as important for understanding the continuous historical entanglements of sovereignty and spatial forms of violence.