I'm not sure this information exists but it's something I've wondered about.. Does anyone know if one branch of the military - Land, Air, Sea - has a higher percentage of PTSD casualties than another? Like does land forces (army) for example have more cases of PTSD as opposed to the navy? Or are they all pretty much same percentages across the board? You certainly hear about PTSD in the land forces more often, but that doesn't mean anything. Just wondering..