to attack Hungary to seize territories. The military and political events changed rapidly and drastically after the Hungarian self-disarmament. on 5 November 1918, the Serbian army, with the help of the French army, crossed southern borders, on 8 November, the Czechoslovak Army crossed the northern borders, on 10 November d'Espérey's French-Serbian army crossed the Danube river and was poised to enter the Hungarian heartland, on 11 November Germany signed an armistice with Allies, under which they had to immediately withdraw all German troops in Romania and in the Ottoman Empire, the Austro-Hungarian Empire and the Russian Empire back to German territory and Allies to have access to these countries. on 13 November, the Romanian army crossed the eastern borders of the Kingdom of Hungary. on 13 November, Károlyi signed the Armistice of Belgrade with the Allied Powers. It limited the size of the Hungarian army to six infantry and two cavalry divisions. Demarcation lines defining the territory to remain under Hungarian control were made, and For their part, the neighboring countries used the so-called "struggle against communism", against the capitalist and liberal government of Count Mihály Károlyi. During the rule of Károlyi's pacifist cabinet, Hungary lost control over approx. 75% of its former pre-WW1 territories (325 411 km2) without armed resistance and was subject to foreign occupation. The lines would apply until definitive borders could be established. Under the terms of the armistice, Serbian and French troops advanced from the south, taking control of the Banat and Croatia. Czechoslovakia took control of Upper Hungary and Carpathian Ruthenia. Romanian forces were permitted to advance to the River Maros (Mureș). However, on 14 November, Serbia occupied Pécs.Breit J. Hungarian Revolutionary Movements of 1918–19 and the History of the Red War in Main Events of the Károlyi Era Budapest 1929. pp. 115–116. Many citizens thought that Károlyi could negotiate soft peace terms with the Allies for Hungary. Károlyi headed the Provisional Government from 1 November 1918 until 16 November, when the Hungarian Democratic Republic was proclaimed. Károlyi ruled Hungary through a National Council, transformed into the government that consisted of his party in alliance with the large Hungarian Social Democratic Party and the small Civic Radical Party led by Oszkár Jászi. Additional trouble for the new government occurred over the question of the armistice. Austria-Hungary had signed the lenient Armistice of villa Giusti (close to Padua, Italy) with the Allies on 3 November