From the announcement:
The rules for the upcoming Dust Tactics expansion Operation “Icarus” are now available on our Dust Tactics support page! The siege of Zverograd continues, and the three factions are all trying to secure this vital military target. The Allies currently possess the most powerful air force on the planet, but the Axis is in control of the airfield in Soviet Zverograd. The helicopters of the SSU and the new Axis jets are beginning to close the gap in control of the skies. In order for the Allies to secure their dominance in the air, they must launch a major offensive to take control of the airfield.