Men's Uniform:
https://star-rear-admiral.tumblr.com/post/173161374778/retrospective-ii-set-male-one-swatch-hq
https://star-rear-admiral.tumblr.com/post/168230985963/set-retrospective-male-one-swatch-hq-compatible
https://rona-sims.tumblr.com/post/188926938477/rona-double-breasted-military-jacket-ts4
Here are some female uniforms:
https://simfreaks-historical-cc.tumblr.com/post/186494842640/prideprejudicesims-kinda-felt-like-makin-this
https://batsfromwesteros.tumblr.com/post/183098929180/female-military-set-batsfromwesteros-the-set
This is a great 1940s lookbook: https://emmastillsims.blogspot.com/2019/06/decades-lookbook-1940s.html