Marie-Georges Picquart was a French Army officer and Minister of War. He is best known for his role in the Dreyfus affair, in which he played a key role in uncovering the real culprit.

The Dreyfus affair was a political scandal that divided the Third French Republic from 1894 until its resolution in 1906. The scandal began in December 1894 when Captain Alfred Dreyfus, a 35-year-old Alsatian French artillery officer of Jewish descent, was convicted of treason for communicating French military secrets to the German Embassy in Paris. He was sentenced to life imprisonment and sent overseas to the penal colony on Devil's Island in French Guiana, where he spent the following five years imprisoned in very harsh conditions.