If you choose to be a civilian photographer, then a 5x4 'plate' camera would be the thing: the Speed Graphic comes to mind. Other posters might be kind enough to confirm that is right. I seem to recall they produced a 'Press' model. A military photographer might have also used that. But in a combat zone (and for an attached civilian in such circumstances) a Leica or a Rolleiflex would be more appropriate, especially the former. A Leica 111A or C model would be the one to go for and if used with a lens other than 50mm you will need a supplementary viewfinder to 'look authentic'. Have fun!