Need help. Abbreviation ATSG

Army Toilets Smell Ghastly

Accidentally Touched Short Gwar

Arggh Terribly Smarting Gonads

Antique Tumbler Smashed, Gosh!

Which paper is the crossword in?
I can't find a meaning for the military abbreviation ATSG, if someone knows it please post.
On an ATCAB and completing the pre course book by any chance?
Ammunition Technical Support Group

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