The Universal Military Simulator

The Universal Military Simulator is a computer game developed by Rainbird Software in 1987 for Apple II, Macintosh, Tandy 4000, and IBM microcomputers and compatibles. In 1988 both Atari ST, Amiga versions were released.

This computer wargame allows players to create armies and battlefields, using three-dimensional terrain to place features such as towns and hills. Players can explore historical confrontations such as Hastings, Gettysburg, Waterloo, Arbela, and Marston Moor. The player can zoom in on specific units confronting one another to plan strategy. The player has the option to play against another human opponent.

Source: Wikipedia, "The Universal Military Simulator", available under the CC-BY-SA License.