Soon after the annexation, several resistance groups emerged, but only the communist-led Liberation Front of the Slovene Nation (Slovene: Osvobodilna fronta slovenskega naroda), or simply Liberation Front (Osvobodilna fronta, OF) raised armed units and engaged in sabotage and active resistance. The OF consisted of eighteen distinct groupings, including the Communist Party of Slovenia, quite a large number of members of the Christian Socialist Party, some members of the gymnastic body Sokol, various progressive intellectuals, some former Royal Yugoslav Army officers, and even some members of the strongly-Catholic Slovene People's Party. These bodies varied in origin, ideology and strength, but were united in their policy of immediate armed resistance to the occupying forces.[4]