What did hitter and Stalin do in order to keep powers?

Hitler and Stalin employed a range of authoritarian tactics to maintain their power. Hitler used Propaganda, censorship, and the Gestapo to suppress dissent, while promoting a nationalist and militaristic ideology. Similarly, Stalin implemented purges, show trials, and widespread surveillance through the NKVD to eliminate political rivals and instill fear within the populace. Both leaders cultivated a cult of personality, portraying themselves as indispensable to their nations' futures.