subscribed to the Nazi ideology of "master races", which, in Szálasi's view, included the Hungarians and Germans, and also supported the concept of an order based on the power of the strongest – what Szálasi called a "brutally realistic étatism". But its espousal of territorial claims under the banner of a "Greater Hungary" and Hungarian values ("Hungarizmus" or "Hungarianism") clashed with Nazi ambitions, delaying Hitler's endorsement of that party by several years. The German Foreign Office instead endorsed the pro-German Hungarian National Socialist Party, which had some supporters among ethnic Germans. Before World War II, the Arrow Cross were not proponents of the racial antisemitism of the Nazis, but utilised traditional stereotypes and prejudices to gain votes among voters both in Budapest and the countryside. Nonetheless, the constant bickering among these diverse fascist groups prevented the Arrow Cross Party from gaining more support and power. The Arrow Cross obtained most of its support from a disparate coalition of military officers, soldiers, nationalists and agricultural workers. It was only one of several similar fascist factions in Hungary but was by far the most prominent, through effective recruiting. In the only election it participated in, in May 1939, the party won 15% of the vote and 29 seats in the Hungarian Parliament but this was only superficially impressive as most Hungarians were not permitted to vote. It did become one of the most powerful parties in Hungary but the Horthy leadership banned the Arrow Cross on the outbreak of World War II, forcing it to operate clandestinely. In 1944, the Arrow Cross Party's fortunes abruptly reversed when Hitler lost patience with Horthy's and his moderate prime minister's, Miklós Kállay's, reluctance to fully toe the Nazi line. In March 1944, the Germans invaded and occupied Hungary, which resulted in Kállay fleeing, and a Nazi proxy, Döme Sztójay, replacing him who quickly legalised the Arrow Cross. During the spring and summer of 1944, more than 400,000 Jews were driven into centralised ghettos and then deported from the Hungarian countryside to death camps by the Nazis, with the enthusiastic assistance of the Hungarian Interior Ministry and its gendarmerie (the csendőrség), both of which had members closely linked to the Arrow Cross. Budapest Jews were forced into Yellow Star Houses, approximately 2,000 single-building mini-ghettos identified by a yellow Star of David at the entrance. In August 1944, before deportations from Budapest began, Horthy used what remaining