This is the first line in the Myth gameplay Wikipedia:

All three Myth games play very similarly. They are real-time tactics games, and as such, unlike the gameplay in real-time strategy games, the player does not engage in resource micromanagement or economic macromanagement, does not construct a base or buildings, and does not gradually build up their army by acquiring resources and researching new technologies.[9] Instead, each level begins with the player's army already assembled and ready for combat