American liberators of Nazi camps got ‘a lifelong vaccine against extremism’ − their wartime experiences are a warning for today

A staged recreation of Mauthausen's liberation, May 6, 1945. Spanish prisoners documented the camp's actual liberation the day prior using Nazi cameras. National Archives and Records, Cpl. Donald R. Ornitz, US Signal Corps/Administration, III-SC-206395

When American soldiers liberated the Mauthausen Nazi concentration camp in Austria 80 years ago this May, Spanish prisoners welcomed them with a message of antifascist solidarity.

The Spaniards hung a banner made from stolen bed sheets over one of Mauthausen’s gates. In English, Spanish and Russian, it read: “The Spanish Antifascists Greet the Liberating Forces.”