Departures from the agreement Lieutenant Colonel is third from right Charles I abdicated on 13 November, and days later, the
First Hungarian Republic was proclaimed with Károlyi still at the helm. Henrys set up a French military mission to supervise the implementation of the armistice and deployed it to Budapest. It was led by
Brevet Lieutenant Colonel otherwise assigned to Henrys's staff. It consisted of twelve officers and forty-five enlisted men who arrived at Budapest on 26 November. In addition to the implementation of the agreement, Vix was tasked with gathering intelligence on economic and military matters. Within 24 hours, Vix was sent orders to obtain Hungarian withdrawal from areas of present-day Slovakia, in violation of the armistice of Belgrade, to enforce a claim by
Czechoslovakia directed through French Foreign Minister
Stephen Pichon. The Serbian Army occupied Subotica on the day of the armistice, but proceeded to capture Pécs the following day, as well as Timișoara, Orșova, and Lugoj on 15 November. It went on to occupy Sombor and
Senta on 16 November, and the part of
Arad on the south bank of the Mureș on 21 November. The Serbian Army thereby completed the occupation of Banat, thus abolishing the
Banat Republic which had been proclaimed only days earlier. In early December, the commander of the French forces in Romania, General
Henri Mathias Berthelot, informed Vix that Romanian troops would advance to the
Satu Mare–
Carei–
Oradea–
Békéscsaba line on the pretext of the protection of the Romanian population in the area of
Cluj, and then ordered Vix to obtain Hungary's withdrawal from the city of Cluj itself. Vix complained about the conflict of authority to Henrys and d'Espèrey as he was also receiving instructions from Berthelot and the Czechoslovak envoy to Hungary,
Milan Hodža. Vix ultimately told Henrys that the armistice of Belgrade was worthless. On 25 November, only days after the signing of the armistice, the
Great People's Assembly of Serbs, Bunjevci and other Slavs in Banat, Bačka and Baranja was convened in Novi Sad to proclaim the unification of these regions with Serbia. The State of Slovenes, Croats and Serbs moved to seize
Međimurje – a region predominantly inhabited by
Croats located just north of the demarcation line. The first attempt to occupy Međimurje in mid-November failed, but a second incursion by the
Royal Croatian Home Guard resulted in the region's
occupation on behalf of the newly established
Kingdom of Serbs, Croats and Slovenes on 24 December 1918. According to Jászi, before the armistice, the Hungarian public believed that the Allies would somehow reward Károlyi's pacifist pronouncements. Given that much hope had been placed in the principles of
Wilsonianism, the terms of the armistice led to widespread disillusionment. D'Espèrey was perceived as malicious, menacing, and ignorant. Many Hungarians grew bitter, not only because they found the terms of the armistice unjust, but also due to the real and perceived breaches of those terms. The number of discontent people grew further with the return of demobilised Hungarian troops, released prisoners of war and refugees from the occupied territories. The Károlyi government lost further support as it instituted a policy of
land reform – criticised as too radical by landowners and as half-hearted by others. Dissatisfied conservatives grouped around Károlyi's brother
Gyula, whereas dissatisfied former officers were led by
Gyula Gömbös. The leader of the
Communist Party of Hungary,
Béla Kun, appealed to the
proletariat.
Hungarian Soviet Republic speaking in 1919 In order to address increasingly frequent skirmishes along the Hungarian–Romanian line of control, the
Paris Peace Conference decided on 26 February 1919 to allow Romanian troops in an area beyond the demarcation line established by the armistice of Belgrade, and set up an additional neutral zone to be occupied by Allied forces other than Romanians. This established the "temporary frontier" along the Arad–Carei–Satu Mare line. Vix was tasked with presenting the demand to the Hungarian authorities, along with the request that their withdrawal must start on 23 March and be completed within ten days. On 20 March 1919, Hungary was presented with the demand that became known as the
Vix Note. In response, Károlyi resigned, and a revolutionary council established by the
Social Democratic Party and the Communist Party assumed power. The council abolished the First Hungarian Republic, replacing it with the
Hungarian Soviet Republic. In the summer of 1919, Soviet Hungary fought a
war against Czechoslovakia and a
war against Romania, resulting in the downfall of the communist regime and the Romanian capture of Budapest on 4 August. France urged the Army of the Kingdom of Serbs, Croats and Slovenes to move against the Hungarian Soviet Republic by advancing north from Bačka, but no such military intervention ever took place. In June 1919, Banat was partitioned by the Allies against Romanian complaints that this was contrary to the promise of the entire region being awarded to Romania under the
Treaty of Bucharest. By December, the Romanians gave way to diplomatic pressure and agreed to the Kingdom of Serbs, Croats and Slovenes receiving the western part of Banat. On 12 August, the armed forces of the Kingdom of Serbs, Croats and Slovenes occupied
Prekmurje. The move had been authorised by the Paris Peace Conference a month earlier as compensation for the kingdom's contribution to the suppression of the Hungarian Soviet Republic. A
short-lived republic was proclaimed in Prekmurje in late May, but was suppressed by Hungarian troops in early June. On 4 June 1920, the Paris Peace Conference produced the
Treaty of Trianon as the peace agreement between the Allies and
Hungary. Territorial changes under the treaty awarded Transylvania,
Crișana, the southern part of
Maramureș and the eastern part of Banat to Romania – exceeding the armistice of Belgrade demarcation line in Romania's favour. The Kingdom of Serbs, Croats and Slovenes formally received Bačka, the western part of Banat, and the southern part of
Baranya – a territory similar to the one specified in the armistice of Belgrade. A
Yugoslav-Hungarian Boundary Commission was tasked with defining a definitive delimitation between the two states. From those territories, as well as those lost to Czechoslovakia and
Austria, 350,000–400,000 refugees left or fled to Hungary, where subsequently, according to Hungarian author
Paul Lendvai, they became receptive to extremist and populist views. ==References==