The
aftermath of the First World War left many issues to be settled, including the exact position of national boundaries and which country particular regions would join. Most of these questions were handled by the victorious Allied Powers in bodies such as the Allied Supreme Council. The Allied Powers tended to refer only particularly difficult matters to the League. This meant that, during the early
interwar period, the League played little part in resolving the turmoil resulting from the war. The questions the League considered in its early years included those designated by the Paris Peace treaties. As the League developed, its role expanded, and by the middle of the 1920s it had become the centre of international activity. This change can be seen in the relationship between the League and non-members. The United States and the Soviet Union, for example, increasingly worked with the League. During the second half of the 1920s, France, Britain and Germany were all using the League of Nations as the focus of their diplomatic activity, and each of their foreign secretaries attended League meetings at Geneva during this period. They also used the League's machinery to try to improve relations and settle their differences.
Åland Islands Åland is a collection of around 6,500 islands in the
Baltic Sea, midway between
Sweden and
Finland. The islands are almost exclusively
Swedish-speaking, but in 1809, the Åland islands, along with Finland, became part of the
Russian Empire. In December 1917, during the turmoil of the
Russian Revolution, Finland declared its independence, but most of the Ålanders wished to rejoin Sweden. The Finnish government considered the islands to be a part of their new nation, as the
Emperor of Russia had included Åland in the
Grand Duchy of Finland, formed in 1809. By 1920, the dispute had escalated to the point that there was danger of war. The British government referred the problem to the League of Nations Council, but Finland would not let the League intervene, as they considered it an internal matter. The League created a small panel to decide if it should investigate the matter and, with an affirmative response, a neutral commission was created. In June 1921, the League announced its decision: the islands were to remain a part of Finland, but with guaranteed protection of the islanders, including demilitarisation. With Sweden's reluctant agreement, this became the first European international agreement concluded directly through the League.
Upper Silesia The Allied powers referred the problem of
Upper Silesia to the League after they had been unable to resolve the territorial dispute between Poland and Germany. In 1919
Poland voiced a claim to Upper Silesia, which had been part of
Prussia. The Treaty of Versailles had recommended a
plebiscite in Upper Silesia to determine whether the territory should become part of Germany or Poland. Complaints about the attitude of the German authorities led to rioting and eventually to the first two
Silesian Uprisings (1919 and 1920). A plebiscite took place on 20 March 1921, with 59.6 per cent (around 500,000) of the votes cast in favour of joining Germany, but Poland claimed the conditions surrounding it had been unfair. This result led to the
Third Silesian Uprising in 1921. On 12 August 1921, the League was asked to settle the matter; the Council created a commission with representatives from Belgium, Brazil,
China and
Spain to study the situation. The committee recommended that Upper Silesia be divided between Poland and Germany according to the preferences shown in the plebiscite and that the two sides should decide the details of the interaction between the two areas – for example, whether goods should pass freely over the border due to the economic and industrial interdependence of the two areas. In November 1921, a conference was held in Geneva to negotiate a convention between Germany and Poland. A final settlement was reached, after five meetings, in which most of the area was given to Germany, but with the Polish section containing the majority of the region's
mineral resources and much of its industry. When this agreement became public in May 1922, bitter resentment was expressed in Germany, but the treaty was still ratified by both countries. The settlement produced peace in the area until the beginning of the Second World War.
Albania The frontiers of the
Principality of Albania had not been set during the
Paris Peace Conference in 1919, as they were left for the League to decide. They had not yet been determined by September 1921, creating an unstable situation.
Greek troops conducted military operations in the south of Albania.
Kingdom of Serbs, Croats and Slovenes (Yugoslav) forces became engaged, after clashes with Albanian tribesmen, in the northern part of the country. The League sent a commission of representatives from various powers to the region. In November 1921, the League decided that the frontiers of Albania should be the same as they had been in 1913, with three minor changes that favoured
Yugoslavia. Yugoslav forces withdrew a few weeks later, albeit under protest. The borders of Albania again became the cause of international conflict when Italian General
Enrico Tellini and four of his assistants were ambushed and killed on 27 August 1923 while marking out the newly decided border between Greece and Albania. Italian leader
Benito Mussolini was incensed and demanded that a commission investigate the incident within five days. Whatever the results of the investigation, Mussolini insisted that
the Greek government pay Italy
Lire 50 million in reparations. The Greeks said they would not pay unless it was proved that the crime was committed by Greeks. Mussolini sent a warship to shell the Greek island of
Corfu, and Italian forces
occupied the island on 31 August 1923. This contravened the League of Nations Covenant, so Greece appealed to the League to deal with the situation. The Allied Powers agreed (at Mussolini's insistence) that the
Conference of Ambassadors should be responsible for resolving the dispute because it was the conference that had appointed General Tellini. The League of Nations Council examined the dispute, but then passed on their findings to the Conference of Ambassadors to make the final decision. The conference accepted most of the League's recommendations, forcing Greece to pay fifty million lire to Italy, even though those who committed the crime were never discovered. Italian forces then withdrew from Corfu.
Memel The port city of
Memel (now
Klaipėda) and the
surrounding area, with a predominantly German population, was under provisional Entente control according to Article 99 of the
Treaty of Versailles. The French and Polish governments favoured turning Memel into an
international city, while the government of
Lithuania wanted to annex the area. By 1923, the fate of the area had still not been decided, prompting Lithuanian forces to invade in January 1923 and seize the port. After the Allied Powers failed to reach an agreement with Lithuania, they referred the matter to the League of Nations. In December 1923, the League of Nations Council appointed a Commission of Inquiry. The commission chose to cede Memel to Lithuania and give the area autonomous rights. The
Klaipėda Convention was approved by the Council on 14 March 1924, and then by the Allied Powers and Lithuania. In 1939, Nazi Germany retook the region following an
ultimatum to Lithuania, demanding the return of the region under threat of war. The League of Nations failed to prevent the forcible annexation of the Memel region by Germany.
Hatay With League oversight, the
Sanjak of
Alexandretta in the
French Mandate of Syria was given autonomy in 1937. Renamed Hatay, its parliament declared independence as the
Republic of Hatay in September 1938, after elections the previous month. It was annexed by
Turkey with French consent in mid-1939.
Mosul The League resolved a dispute between the Kingdom of Iraq and the
Republic of Turkey over control of the former Ottoman province of
Mosul in 1926. According to the British, who had been awarded a League of Nations
mandate over Iraq in 1920 and therefore represented Iraq in its foreign affairs,
Mosul belonged to Iraq; on the other hand, the new Turkish republic claimed the province as part of its historic heartland. A League of Nations Commission of Inquiry, with members from Belgium, Hungary and Sweden, was sent to the region in 1924; it found that the people of Mosul did not want to be part of either Turkey or Iraq, but if they had to choose, they would pick Iraq. In 1925, the commission recommended that the region stay part of Iraq, under the condition that the British hold the mandate over Iraq for another 25 years, to ensure the autonomous rights of the
Kurdish population. The League Council adopted the recommendation and decided on 16 December 1925 to award Mosul to Iraq. Although Turkey had accepted League of Nations arbitration in the
Treaty of Lausanne (1923), it rejected the decision, questioning the Council's authority. The matter was referred to the Permanent Court of International Justice, which ruled that, when the Council made a unanimous decision, it must be accepted. Nonetheless, Britain, Iraq and Turkey ratified a separate treaty on 5 June 1926 that mostly followed the decision of the Council and also assigned Mosul to Iraq. It was agreed that Iraq could still apply for League membership within 25 years and that the mandate would end upon its admission.
Vilnius After World War I, both
Poland and
Lithuania gained independence, however the two countries soon became immersed in territorial disputes. During the
Polish–Soviet War, Lithuania signed the
Moscow Peace Treaty with
Soviet Russia that laid out Lithuania's frontiers. This agreement gave Lithuania control of the city of
Vilnius (, ), the old Lithuanian capital, but a city with a majority Polish population. This heightened tension between Lithuania and Poland and led to fears that they would resume the
Polish–Lithuanian War, and on 7 October 1920, the League negotiated the
Suwałki Agreement establishing a cease-fire and a demarcation line between the two nations. On 9 October 1920, General
Lucjan Żeligowski, commanding a Polish military force in contravention of the Suwałki Agreement, took the city and established the
Republic of Central Lithuania. After a request for assistance from Lithuania, the League of Nations Council called for Poland's withdrawal from the area. The Polish government indicated they would comply, but instead reinforced the city with more Polish troops. This prompted the League to decide that the future of Vilnius should be determined by its residents in a plebiscite and that the Polish forces should withdraw and be replaced by an international force organised by the League. The plan was met with resistance in Poland, Lithuania, and the Soviet Russia, which opposed any international force in Lithuania. In March 1921, the League abandoned plans for the plebiscite. After unsuccessful proposals by
Paul Hymans to create a federation between Poland and Lithuania, which was intended as a reincarnation of the former
Polish–Lithuanian Commonwealth which the two nations had shared before losing their independence, Vilnius and the surrounding area was formally annexed by Poland in March 1922. After Lithuania took over the
Klaipėda Region, the
Allied Conference set the frontier between Lithuania and Poland, leaving Vilnius within Poland, on 14 March 1923. Lithuanian authorities refused to accept the decision, and officially remained in a state of war with Poland until 1927. It was not until the
1938 Polish ultimatum that Lithuania restored diplomatic relations with Poland and thus
de facto accepted the borders.
Colombia and Peru There were several border conflicts between
Colombia and
Peru in the early part of the 20th century, and in 1922, their governments signed the
Salomón-Lozano Treaty in an attempt to resolve them. As part of this treaty, the border town of
Leticia and its surrounding area was ceded from Peru to Colombia, giving Colombia access to the
Amazon River. On 1 September 1932, business leaders from Peruvian rubber and sugar industries who had lost land, as a result, organised an armed takeover of Leticia. At first, the
Peruvian government did not recognise the military takeover, but
President of Peru Luis Sánchez Cerro decided to resist a Colombian re-occupation. The
Peruvian Army occupied Leticia, leading to an armed conflict between the two nations. After months of diplomatic negotiations, the governments accepted mediation by the League of Nations, and their representatives presented their cases before the Council. A provisional peace agreement, signed by both parties in May 1933, provided for the League to assume control of the disputed territory while bilateral negotiations proceeded. In May 1934, a final peace agreement was signed, resulting in the return of Leticia to Colombia, a formal apology from Peru for the 1932 invasion, demilitarisation of the area around Leticia, free navigation on the Amazon and
Putumayo Rivers, and a pledge of
non-aggression.
Saar Saar was a province formed from parts of Prussia and the
Rhenish Palatinate and placed under League control by the Treaty of Versailles. A plebiscite was to be held after fifteen years of League rule to determine whether the province should belong to Germany or France. When the referendum was held in 1935, 90.3 per cent of voters supported becoming part of Germany, which was quickly approved by the League of Nations Council.
Eastern Greenland In 1933 the
international court of the League of Nations ruled in the Danish-Norwegian dispute over
Erik the Red's Land (eastern
Greenland) that for it to remain Danish, Denmark had to assert its sovereignty there. Initially, this presence was in the form of two fixed police stations. During the summer of 1941 the
Sirius Dog Sled Patrol, first known as the North-East Greenland Sledge Patrol was activated to conduct
long-range reconnaissance patrols along the northeast coast of Greenland to prevent a military presence of
Nazi Germany there. ==Other conflicts==