There were death camps run by the American and French military, for German prisoners of war, in 1945. Huge numbers (around a million) of German soldiers died in them, from engineered starvation and exposure.
Here's a senior historian, in the forward to the book Other Losses: An Investigation into the Mass Deaths of German Prisoners at the Hands of the French and Americans after World War II
“Starting in April 1945, the United States Army and the French Army casually annihilated about one million [German] men, most of them in American camps … Eisenhower’s hatred, passed through the lens of a compliant military bureaucracy, produced the horror of death camps unequalled by anything in American military history.
I first came across this almost completely unknown historical event in a small town in Austria. On the outskirts of town was a memorial to the tens of thousands of prisoners of war who died there, penned up in a field, with almost no food or clothing.
The Greatest War Crime Never Told