[brudigia]

Military Sf ? Uhm, I could advise the Caine series.
It is a mixed bag, and certainly the second book is military sf, I suppose.
The series, until now is composed of 3 books,

Fire with Fire, Trial by fire and Raising Caine. All BAEN and in bundles as well, if you can still get some of them.

The second I found very compelling, if you like those books where Earthmen are smarter than anybody else (which is belittling the book a lot). It is really good.
Did you try the classics (Starship trooper, Forever war) ?
I also like Scalzi, "Old man's war" is really good as well, as is the second of the series.
Tried Weber (Redliners is free, if you wish to try). Good first part, especially the assault scenes, then it goes down.

I found quite readable the Odyssey series by Evan Currie, all four of them. Strongly advised.

Jay Allan (his marines serie) or Gus Flory (Galaxy of Heroes, only 2 books, but for once mankind is badly put, and it is quite readable and compelling) or B.V. Larson (the Star Force serie, cheap but quite nice and even if not small tomes, quite a quick read). Some of these guys are probably held as second fiddles to bigger guns, but they are quite good, and their books are worth the money they cost.
Or William Dietz, I found his "Legion of the Damned" quite nice
I would second also the Empire of man, read the first one, and it was good.
Enjoy.