Free Territory of Trieste

Border between the Free Territory of Trieste (Duino-Aurisina / Devin-Nabrežina) and Italy (Monfalcone)

Italy fought with Nazi Germany as an Axis power in World War II from 1940. When the Fascist regime collapsed in 1943 and Italy capitulated, the territory was occupied by German forces who created the Operational Zone of the Adriatic Littoral, the capital of which was Trieste. The Yugoslav 4th Army and the Slovenian 9th Corps entered Trieste on 1 May 1945, after a battle in the town of Opicina. The 2nd Division (New Zealand) arrived the next day and forced the surrender of the 2,000 German Army troops holding out in Trieste, who warily had refused to capitulate to Yugoslav troops, fearing they would be executed by them. An uneasy truce developed between New Zealand and Yugoslav troops occupying the area until British General Sir William Morgan proposed a partition of the territory and the removal of Yugoslav troops from the area occupied by the Allies. Yugoslav leader Josip Broz Tito agreed in principle on 23 May, as the British XIII Corps was moving forward to the proposed demarcation line. An agreement was signed in Duino on 10 June, creating the Morgan Line. The Yugoslav troops withdrew by 12 June 1945.[6][7]

A postage stamp for Zone B of the Free Territory of Trieste, 1948

In January 1947, the United Nations Security Council approved Resolution 16 under Article 24 of its charter calling for the creation of a free state in Trieste and the region surrounding it. A permanent statute codifying its provisions was to become recognized under international law upon the appointment of an international governor approved by the Quatripartite Powers. On 15 September 1947, the peace treaty between the United Nations (UN) and Italy was ratified, establishing the Free Territory of Trieste. Official languages were Italian and Slovene, possibly with the use of Serbo-Croatian in the portion of Zone B south of the Dragonja River. However, the territory never received its planned self-government and it was maintained under military occupation respecting the administrative division into two zones as decided by the Morgan Line: Zone A, which was 222.5 square kilometres (85.9 sq mi) and had 262,406 residents including Trieste, was administered by British and American forces, while Zone B, which was 515.5 square kilometres (199.0 sq mi) with 71,000 residents including north-western Istria, was administered by the Yugoslav People's Army.

Cyclists from the Free Territory of Trieste during the 1950 Peace Race in Poland

Between October 1947 and March 1948, the Soviet Union rejected the candidacy of 12 nominations for governor, at which point the Tripartite Powers (United States, United Kingdom, and France) issued a note to the Soviet and Yugoslav governments on 20 March 1948 recommending that the territory be returned to Italian sovereignty. No governor was ever appointed under the terms of Resolution 16. The Territory thus never functioned as a real independent state, although its formal status was generally respected and it was involved in the European Recovery Program (ERP) and in the OEEC.[8] The Tito-Stalin split in mid-1948 resulted in the proposal to return the territory to Italy being suspended until 1954.

The Allied Military Government administered Zone A, which was divided into peacekeeping and law enforcement sectors protected by a command of 5,000 Americans ("TRUST", the Trieste United States Troops) and 5,000 British in "BETFOR" (British Element Trieste FORce), each comprising a brigade-sized infantry force and complete support units (signals, engineers, military police, etc.)

According to the estimates published by the Allied Military Government, as of 1949 in Zone A there were about 310,000 inhabitants,[9] including 239,200 Italians and 63,000 Slovenes. According to contemporary Italian sources, in Zone B there were 36,000 to 55,000 Italians and 12,000 to 17,000 Slovenes and Croats. According to the Yugoslav census of 1945, which was considered falsified by the Quadripartite Commission set up by the UN,[10] in the part of Istria which was to become Zone B there were 67,461 inhabitants, including 30,789 Slovenes, Serbs and Croats, 29,672 Italians, and 7,000 people of unidentified nationality. Elections were held twice, in 1949 and 1952, but only for municipal councils, never for the FTT People's Assembly (FTT legislature).

On 5 October 1954, the London Memorandum was signed in the British capital by ministers of the United States, United Kingdom, Italy, and Yugoslavia. It gave the former Zone A with Trieste to Italy for ordinary civil administration, and Zone B, which had already had a communist government since 1947, to Yugoslavia. In addition, Yugoslavia was given the area containing the city of Koper (Koppe) in Zone A, as well as several villages in the municipality of Muggia that had been part of Zone A: Plavje, Spodnje Škofije, Elerji, Hrvatini, Kolomban, Cerej, Premančan, and Barizoni. The castle and village of Socerb above San Dorligo della Valle was also ceded to the Yugoslav administration, according to the demarcation line defined by Annex I to the London Memorandum.

In 1975, the bilateral Treaty of Osimo was signed and ratified two years later, definitively stopping respective claims over the former Free Territory of Trieste by Italy and Yugoslavia, as the London Memorandum only disestablished the territory de facto, but not de jure.[11]

*Governors of all Julian March prior to the establishment of the Territory.[12]