Hungarian Soviet Republic: A short-lived communist state that existed in Hungary in 1919, which prompted Horthy's rise as he opposed the Bolshevik revolution and sought to restore a more traditional order.
Arrow Cross Party: A far-right party in Hungary that supported Nazi Germany and contributed to the anti-Semitic policies during Horthy's regime, culminating in the deportation of thousands of Jews.
Treaty of Trianon: The treaty signed in 1920 that resulted in significant territorial losses for Hungary after World War I, which Horthy's government used to promote nationalistic sentiment.