"Eternal Civilization" is an unofficial expansion pack of "Age of Empires 2: Definitive Edition". More than 80 new units have been added into this MOD, thus each civilization will get at least 1 kind of new unique unit. More general units and general technologies have also been added, and some of the original units and technologies of the game have been adjusted. The Mod is equipped with a dedicated AI. All of the above are to enhance the fun of the game for players!