Alfred Dreyfus (9 October 1859 – 12 July 1935) was a French Army officer best known for his central role in the Dreyfus affair. In 1894, Dreyfus fell victim to a judicial conspiracy that eventually sparked a major political crisis in the French Third Republic when he was wrongfully accused and convicted of being a German spy due to antisemitism. Dreyfus was arrested, cashiered from the French army and imprisoned on Devil's Island in French Guiana. Eventually, evidence emerged showing that Dreyfus was innocent and the true culprit was fellow officer Ferdinand Walsin Esterhazy.
Gradual revelations indicated that the internal investigation conducted by the French army was biased; Dreyfus was an ideal scapegoat due to being a Jew, and military authorities were aware of his innocence but chose to cover up the affair and leave him imprisoned rather than lose face. A political scandal subsequently erupted, shaking French political life and highlighting antisemitism in the French army and government. After numerous judicial and political developments, the publication of Émile Zola's manifesto J'Accuse...! in 1898 brought new momentum to Dreyfus' cause.