You might try some of A. Bertram Chandler's omnibuses.
He wrote a couple dozen novels about starship crewman who works his way up through the ranks, first in the military and then out on his own.
Not really military, sort of Star Trek-ish.
Also Randall Garrett's Lord Darcy Omnibus. About a detective in a fantasy world. (Actually alternative history a little bit, but mostly it's about magic and detectives)
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