Tigers On The Prowl was HPS' 1996 computer game of WWII Eastern Front combat. A classic hex and counter game, it is available in an MS-DOS emulator on the Internet Archive.
Atomic Games' World at War Stalingrad is available on the Internet Archives in a DOS Emulator. The game, co branded with Avalon Hill, dates to 1994, and is a classic hex and counter design.
The Internet Archive has an emulator for SSG's MS-DOS game, Carriers At War. The 1992 game ha a number of Pacific Battles to fight out. I enjoyed this back in the day.
The Internet Archive has an emulator for playing Nuclear War, an MS-DOS game from 1989.
The classic Ancient Art of War game, released by Broderbund in 1984, is available to play on archive.org in an emulator.