Iron Harvest's upcoming expansion 'Operation Eagle' sees the introduction of the mech-infused Usonia faction (that is, America) and a new campaign that moves from the freezing cold of Alaska to the hot deserts of Arabia. And with all of those mechs and giant machines of war the alternate history 1920+ setting now sees western forces looking to occupy Arabia in order to claim its resources (that is, oil).

The new Usonia campaign looks to follow in the cinematic mechanised footsteps of the base-game too, as seen in this new story trailer.

Arabia, a prosperous nation rich in trade, oil and populated by various tribes. With the mass production of mechs, the empire of Saxony now has a need and an opportunity to occupy Arabia, seeking to claim its resource deposits for themselves. Having seen the devastation in Europa during the Great War from afar, the reigning king accepts a concession with Saxony to avoid conflict. Arabia’s Bedouins fiercely resist, but Saxony's war machines prove difficult to overcome. In desperation, the King of Arabia has secretly contacted an ex-colonial nation, Usonia, to help Arabia reclaim its independence. Hope remains they will send aid to help free them.

The new Usonia faction introduces over 20 new units to the game alongside three new playable heroes. Operation Eagle also adds new flying units for all factions, with the "yet to be revealed secret faction" looking to be Arabia.

Iron Harvest 1920+: Operation Eagle releases on May 27 for PC.