Adolf Hitler became involved with the fledgling German Workers Party – which he would later transform into the Nazi Party – after the First World War, and set the violent tone of the movement early, by forming the "Sturmabteilung" (SA) paramilitary. Catholic Bavaria resented rule from Protestant Berlin, and Hitler at first saw revolution in Bavaria as a means to power. An early attempt at a coup d'état, the 1923 Beer Hall Putsch in Munich, proved fruitless, however, and Hitler was imprisoned for leading the putsch. He used this time to write "Mein Kampf", in which he argued that effeminate Jewish–Christian ethics were enfeebling Europe, and that Germany was in need of an uncompromising strongman to restore itself and build an empire. Learning from the failed coup, he decided on the tactic of pursuing power through legal means rather than seizing control of the government by force against the state and instead proclaimed a strictly legal course.