In 1830, the November Uprising began in Warsaw when young non-commissioned officers at the Officer Cadet School rebelled. Although the numerically smaller Polish forces successfully defeated several Russian armies, they were left unsupported by France and the newborn United States. With Prussia and Austria deliberately prohibiting the import of military supplies through their territories, the Poles accepted that the uprising was doomed to failure. After the defeat, the semi-independent Congress Poland lost its constitution, army and legislative assembly, and its autonomy was abolished.