That would be a type of combat arms slot as I recall. Some kind of infantry, like a cannon cocker or some such.
My Dad (a cannon cocker officer in the mid to late '60s) told me "The Army is an experience that you would pay a million bucks for, but not one dime to do again". I think for the most part, he was right. It's tough while your there living it, but looking back it sure makes you proud that you have been a part of something like that. Liberating a country is something one can take great pride in.