Petrus Joannes Maria Dox (7 May 1898 – 26 November 1964) was a Belgian Flemish soldier during the First World War known for his opposition to the Belgian Army's French-speaking officers' discriminatory treatment of Flemish-speaking soldiers. His vocal criticism led to his dismissal from front line service and his reassignment to the woodchopping platoon of the Orne, a penal military unit. After the war, Dox moved to the Belgian Congo where he served as a Christian missionary for the next few decades. He was killed during the Simba rebellion in November 1964.