Œuvre de secours aux enfants (French: [œvʁ də səkuʁ oz‿ɑ̃fɑ̃], Children's Aid Society), abbreviated OSE is a French Jewish humanitarian organization which was founded in Russia in 1912 to help Russian Jewish children. Later it moved to France. OSE's most important activities took place both before and during World War II. OSE assisted mainly Jewish refugee children, both from France and from other Western European countries. OSE rescued children from extermination by Nazi Germany. It also operated after World War II.