The Sentinel of Liberty takes on the galaxy’s deadliest threat!It’s World War II, and Hydra seeks a new weapon to defeat the Allies and win the war. To that end, the Red Skull has sent Baron Strucker on an expedition to the Himalayas to find the fabled city of Attilan. But instead of finding the Inhumans, Strucker uncovers something much more deadly. Much more... Alien. Battling to stop the Skull and his newfound Xenomorph weapons, Cap and the Howling Commandos are about to face their biggest fight yet – that is, unless another unexpected extraterrestrial sees fit to intervene! As the secret history between two alien races is revealed, the First Avenger will learn that, in war-torn Europe, no one can hear you scream!COLLECTING: Alien vs. Captain America (2025) #1-4.