 His younger brothers Luís and Antônio followed him at the same military school.Pedro was formed as Lieutenant of the Austro-Hungarian Army at the 4th Regiment of Uhlans and was later Captain on the reserve.In 1900 Pedro met Countess Elisabeth Dobržensky de Dobrženicz, a noblewoman of the Austro-Hungarian Empire, daughter of Johann-Wenzel, Count Dobrzensky von Dobrzenicz, who came from a former noble family of Bohemia, and Elizabeth, Baroness Kottulin und Krzischkowitz and Countess Kottulinsky.