French anti-Semitism was made very apparent through the Dreyfus affair which dominated much cultural and political discussion between 1894 and 1906. The First World War fostered a requirement for national unity but anti-Semitism resurfaced in the 1930s, fuelled by economic difficulties, and provided a rallying cry for such right-wing and ultra-Catholic movements as Action française. Following France’s defeat by Germany in 1940, the Vichy regime imposed an anti-Semitic régime and actively collaborated in the deportation of Jews to concentration camps. In Anti-Semite and Jew, Sartre analyses and denounces this French anti-Semitism, critiquing the masquerade that anti-Semitism was a Nazi import.