Siege

Siege is a fantasy strategy game based on combat between castles, developed by Mindcraft Software and released for PC MS-DOS only in 1992. The player can join either the Forces of Lights (humans, dwarves, elves, etc.) or the Forces of Darkness (orcs, trolls, domugs, etc.) and can command 17 different types of troops and siege types of equipment. Despite not being very popular, the game received excellent reviews. It's also worth noting that Siege introduced the "orcs vs. humans" theme two years before the first Warcraft game was released.