Cpt. Lokken's Moustache
Member
While you are technically correct, it's a bit more difficult to classify a soldier as a casualty if you know their recovery is assured. Granted, wounded will be unavailable for a time but unless they are completely dead, they will return to active service eventually. But you do make a fair point, it may also hinge a bit on how the individual defines a casualty as opposed to the strict definition.
For the purposes of this I'd recommend going with casualty for a kill or a critical wound (Which causes permanent loss of will, and generally constitutes a mission kill in gameplay)