Armies of unprecedented numbers were deployed during World War I, and of course the losses were very high for each warring party. The Geneva Convention (1864) obliges everyone to treat prisoners of war in a humane way, so health facilities have been designed with great care. The Army Central Engineering Department has provided type designs so to get construction contractors up and running as soon as possible. Built near the Ostffyasszonyfa (actually Nagysimonyi), a barrack town of 40-50,000 people has already been disappeared nearly without a trace, and is overgrown by a forest.