Vivendi today announced that Sierra Entertainment and Mad Doc Software are working on the add-on for Empire Earth II. Entitled Empire Earth II: The Art of Supremacy, the add-on features two new modes - Fealty Mode and Tug-of-War Mode -, three new globe-spanning campaigns, ten new combat units, including Zulu Warriors, Russian Howitzers, and Rafale Stealth fighters, a new editor and an improved multiplayer matchmaking interface. Check these first screenshots and press' read more' for details.