Historical Chronology:
 1.11.1918: the Entente forces led by General Franchet d'Esperey enter Belgrade.
 1.11.1918: the representatives of Austria-Hungary sign an armistice with the Entente at Padua.
7_13.11.1918: negotiations on the Belgrade military Convention of Armistice [known also as the
              "Belgrade Armistice"] which will be signed by General Paul P. Henrys, the 
              Voyvode Zivojin Misic -as Franchet d'Esperey's delegates- and Linder Béla, the 
              delegate of Hungarian Government lead by Károlyi Mihály.
24.11.1918: soon after the Belgrade Armistice, Banat was entirely occupied by the Serbian Army.
 Jan. 1919: the Serbians withdrew from the eastern part of the Banat, namely from the 
            Krasso-Szöreny/ie Caras-Severin and a little part from Temes/ie Timis counties.
            Here their place was taken by the French Army. 
            After withdrawing from Eastern Banat, the Serb administration continued in a 
            rectangular area of the Banat bounded by the Mures River to the North, a line 
            10 Km East of the Timisoara-Vrsac railway track on the East, the Tisa River to the
            West, and the Danube River to the South. 
            Following the decision to divide the Banat along ethnic lines, the Serbs withdrew
            from this region too to form the new Serbian-Romanian frontier. So, the Serbian 
            occupation in what is today the Romanian Banat lasted until 26.07.1919 [in the 
            Western part of Banat, namely in counties of Torontal (partially) and Temes with
            Temesvár/Timisoara]. 
28.07.1919: the entire today's Romanian Banat came under the Romanian administration, being
            gradually occupied by the Romanian troops.
 3.08.1919: the Romanian troops entered in Timisoara.
20.08.1919: the Romanian troops occupied the entire today's Romanian Banat.
10.08.1920: the Sčvres Treaty between the Principal Allied and Associated Powers and Poland,
            Roumania, the Serb-Croat-Slovene State and the Czechoslovak State relative to 
            Certain Frontiers of those States. 
            The historical Banat is split in 3 parts [see Article 3 below].
24.11.1923: a further frontier change took place with Romania receiving from the Kingdom of
            Serbs, Croats, and Slovenes the town of Jimbolia together with Beba-Veche, 
            Pusta-Kerestur, Ciorda, Iam while Romania renounced to Modos (today Yasa Tomic),
            Pardany, Surjan, Crivobara, Nagy Gaj]. The border thus took on the configuration
            that is present today.  

~~~~~~~~~~~~~~~~~
Treaty between the Principal Allied and Associated Powers and 
Poland, Romania, the Serb-Croat-Slovene State and the Czechoslovak State relative to 
Certain Frontiers of those States [Sčvres, 10.08.1920]

Article 3
Subject to the special provisions of the Treaties, Supplementary Agreements and Decisions 
concluded or to be concluded for the purpose of completing the present settlement, the High
Contracting Parties recognise the sovereignty of Romania over the territories defined by the
following frontiers (see map No. 2):
1. With Hungary, the frontier defined by Article 27.3 [see below] of the Treaty of Peace 
   concluded with Hungary on 4.06.1920 [our note: known as the Trianon Peace Treaty].
2. With the Serb-Croat-Slovene State, the following line:
From the point common to the three frontiers of Roumania, Hungary and the Serb-Croat-Slovene
 State, a point to be chosen on the ground about 4 km south-west of Kiszombor Station, and 
 approximately east-south-east of point 84 and south-south-east of point 83, in a general 
 south-south-easterly direction to a point on the Zsombolya-Lovrin railway about 3 km north
 of Zsombolya,
-a line to be fixed on the ground passing east of Pusztakeresztur, west of Porgany and 
 Bolgartelep; then between Valkany on the east and the Nagykikinda-Szeged railway on the 
 west, then between Marienfeld (Mariafölde) and Mokrin, east of Nakofalva and Seultour 
 (Szentborbala), west of Banat-Komlos (Nagykomlos) and Osztern (Kiskomlos);
-thence southwards to a point on the Temes between Surjan and Boka about 6 km south of Modos,
-a line to be fixed on the ground cutting the Temesvar-Nagykikinda railway between 
 Zsombolya (Hatzfeld) and Gyertyamos and passing between Klari and Horvat-Kecsa (Köcse), west
 of Otelek, Janosfölde and Pardany, east of Tamasfalva and Felsöittebe, between Istvanfölde 
 and Modos.
-thence approximately south-eastwards to a point to be fixed between Jam and Mirkocz on the
 Karasjeszenö-Oraviczabanya railway,
-a line to be fixed on the ground passing north of Kanak, between Szecsenfalva and
 Torontalujfalu, between Zichyfalva and Nagygaj, between Verseczvat and Temesmora, between
 Kiszsam, Nagyszered, Temes-Kutas and Marktelke to the west and Nagyzsam, Laczunas and 
 Komornok (Komoriztye) to the east, between Temesszöllös and Varadia, between Csorda and 
 Alsovarany;
-thence south-eastwards to a point to be fixed on the Nera about 1 km east of the 
 Kusics-Zlaticza (Neraaranyos) road,
-a line to be fixed on the ground passing between Krusicza (Körted) and Nikolinez 
 (Mikloshaza), curving east of point 234 and Rebenburg (Szöllöshegy) and thence 
 west-south-westwards so as to allow the construction of a normal gauge railway in Romanian
 territory along the valley of the Nera between Zlaticza (Neraaranyos) and Petrilova;
-thence downstream to the confluence of the Nera and the Danube,
-the course of the Nera;
-thence south-eastwards to the confluence of the Timok with the Danube,
-the principal channel of navigation of the Danube.
This confluence is the point common to the three frontiers of Bulgaria, Roumania and the
Serb-Croat-Slovene State.

~~~~~~~~~~~~~~~~~
Treaty of Peace between the Allied and Associated Powers and Hungary 
Protocol and Declaration (Trianon, 4.06.1920)

Article 27. 
The frontiers of Hungary shall be fixed as follows (see annexed Map):
...
3. With Romania: 
From the point defined above east-north-eastwards to a point to be selected on the Maros 
about 31/2 km upstream from the railway bridge between Mako and Szeged, 
-a line to be fixed on the ground; 
-thence south-eastwards, and then north-eastwards to a point to be selected about 1 km south
 of Nagylak station, 
-the course of the river Maros upstream; 
-thence north-eastwards to the salient of the administrative boundary between the comitats of
 Csanad and Arad north-north-west of Nemetpereg, 
-a line to be fixed on the ground passing between Nagylak and the railway station; 
-thence east-north-eastwards to a point to be selected on the ground between Battonya and 
 Tornya, 
-this administrative boundary, passing north of Nemetpereg and Kispereg; 
-thence to point 123 (about 1,2 km east of Magosliget), the point common to the three 
 frontiers of Hungary, Romania and Czecho-Slovakia (Ruthenian territory), 
-a line to be fixed on the ground passing west of Nagyvarjas, Kisvarjas and Nagyiratos, east
 of Dombegyhaz, Kevermes and Elek, west of Ottlaka, Nagy-Pel, Gyula-Varsand, Ant and Illye, 
 east of Gyula, Gyula-Vari and Kötegyan, cutting the Nagyszalonta-Gyula railway about 12 km
 south-west of Nagyszalonta and between the two bifurcations formed by the crossing of this 
 line and the Szeghalom-Erdögyarak railway; passing east of Mehkerek, west of Nagyszalonta and
 Marczihaza, east of Geszt, west of Atyas, Olah-Szt-Miklos and Rojt, east of Ugra and Harsany,
 west of Körösszeg and Körös-Tarjan, east of Szakal and Berek-Böszörmeny, west of Bors, east
 of Artand, west of Nagy-Szanto, east of Nagy-Kereki, west of Pelbarthida and Bihardioszeg,
 east of Kis-Marja, west of Csokaly, east of Nagyleta and Almosd, west of Er-Selind, east of
 Bagamer, west of Er-Kenez and Ermihalyfalva, east of Szt-György-Abrany and Peneszlek, west of
 Szaniszlo, Bere-Csomaköz, Feny, Csanalos, Börvely and Domahida, east of Vallaj, west of
 Csenger-Bagos and Ovari, east of Csenger-Ujfalu, west of Dara, east of Csenger and 
 Komlod-Totfalu, west of Pete, east of Nagy-Gecz, west of Szaraz-Berek, east of Mehtelek, 
 Garbolcz and Nagy-Hodos, west of Fertös-Almas, east of Kis-Hodos, west of Nagy-Palad, east of
 Kis-Palad and Magosliget.