Wouldn't it be redundant to have the 13th prohibit both slavery and a legal term for slavery? It says "neither" and "nor". Obviously the law makers had the idea they were different things.
I think you should look up "involuntary servitude" and some recent cases.

"Section 1584 of Title 18 makes it unlawful to hold a person in a condition of slavery, that is, a condition of compulsory service or labor against his/her will. A Section 1584 conviction requires that the victim be held against his/her will by actual force, threats of force, or threats of legal coercion. Section 1584 also prohibits compelling a person to work against his/her will by creating a "climate of fear" through the use of force, the threat of force, or the threat of legal coercion which is sufficient to compel service against a person's will." From the USDOJ.

If I forced you, through any means, to work, whether or not I paid you to do that work, it would be involuntary servitude. What's good for the goose, is good for the govt.

I recall one time and ONLY one time in fairly recent history of this country that the military was used in defense of this country. Even then most of the lives were lost not defending this country, but defending other countries.
I've had more likelyhood of NOT being alive "to spout such crap" because we were busy fighting other's wars, not because we were busy DEFENDING this country.