The great RTS game Iron Harvest will extend its content on May 27th with the release of the Operation Eagle expansion on Steam (also as a standalone), Epic Games Store and GOG. The add-on introduces the American Union of Usonia faction that comes with over 20 units, a full campaign, 3 new playable heroes, new allies from an unrevealed faction, new maps, new structures and flying units for all factions. First screens and teaser inside.