Campaign is a strategy war game developed and pusblished by Empire Interactive. It was released in 1992 for DOS and in 1993 for the Amiga and Atari ST.
The game is set in World War II. The player may play out scenarios like the Battle of the Bulge and D-Day. Apart from the strategic map, a battle mode will be opened if two hostile forces venture too near each other.
The military units are rendered well in this game, and it includes a 170-page-long equipment manual which also serves as the Game's copy protection. It also includes a map editor to create scenarios or modify parts of the game.
It was followed by a sequel, Campaign II.
Source: Wikipedia, "Campaign (video game)", available under the CC-BY-SA License.