Career
As a soldier he participated in the World War I, fighting in Austrian army in Russia and Italy. He got injured in 1917 and returned back to Brno and later moved to Prague. There he met people from the Czechoslovakian National Committee, the body who led the Czechoslovakian and Czechoslovak independence movement.
Rošický with Sokol leader Josef Scheiner were in charge of the respective military operations.
His brother-in-law (wife’s brother) was Czechoslovakian politician Zdeněk Fierlinger.