thumb|right|320px|Boys' roll call at the main Łódź Ghetto#Deportations|children's concentration camp in [[Łódź, of which KZ Dzierżązna, for Polish girls as young as eight, was a sub-camp.]]
thumb|right|320px|Boys' roll call at the main Łódź Ghetto#Deportations|children's concentration camp in [[Łódź, of which KZ Dzierżązna, for Polish girls as young as eight, was a sub-camp.]]
Heuaktion (German: "hay harvest", or "hay operation") was a World War II operation in which 40,000 to 50,000 Polish and Ukrainian children aged 10 to 14 were kidnapped by German occupation forces and transported to Nazi Germany as slave labourers.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).