The League of Nations was the first worldwide intergovernmental organisation whose principal mission was to maintain world peace. It was founded on 10 January 1920 by the Paris Peace Conference that ended the First World War. The main organization ceased operations on 20 April 1946 but many of its components were relocated into the new United Nations.
The Treaty of Versailles was a peace treaty signed on 28 June 1919. As the most important treaty of World War I, it ended the state of war between Germany and most of the Allied Powers. It was signed in the Palace of Versailles, exactly five years after the assassination of Archduke Franz Ferdinand, which led to the war. The other Central Powers on the German side signed separate treaties. The United States never ratified the Versailles treaty and made a separate peace treaty with Germany. Although the armistice of 11 November 1918 ended the actual fighting, it took six months of Allied negotiations at the Paris Peace Conference to conclude the peace treaty. Germany was not allowed to participate in the negotiations—it was forced to sign the final result.
The Fourteen Points was a statement of principles for peace that was to be used for peace negotiations in order to end World War I. The principles were outlined in a January 8, 1918 speech on war aims and peace terms to the United States Congress by President Woodrow Wilson. However, his main Allied colleagues were skeptical of the applicability of Wilsonian idealism.
The Locarno Treaties were seven agreements negotiated in Locarno, Switzerland, during 5 to 16 October 1925 and formally signed in London on 1 December, in which the First World War Western European Allied powers and the new states of Central and Eastern Europe sought to secure the post-war territorial settlement, in return for normalising relations with the defeated German Reich. It also stated that Germany would never go to war with the other countries. Locarno divided borders in Europe into two categories: western, which were guaranteed by the Locarno Treaties, and eastern borders of Germany with Poland, which were open for revision.
The Paris Peace Conference was the formal meeting in 1919 and 1920 of the victorious Allies after the end of World War I to set the peace terms for the defeated Central Powers. Dominated by the leaders of Britain, France, the United States and Italy, it resulted in five treaties that rearranged the maps of Europe and parts of Asia, Africa and the Pacific Islands, and also imposed financial penalties. Germany and the other losing nations had no voice in the Conference's deliberations; this gave rise to political resentments that lasted for decades.
The Klaipėda Region or Memel Territory was defined by the 1919 Treaty of Versailles in 1920 and refers to the northernmost part of the German province of East Prussia, when as Memelland it was put under the administration of the Entente's Council of Ambassadors. The Memel Territory, together with other areas severed from Germany was to remain under the control of the League of Nations until a future day when the people of these regions would be allowed to vote on whether the land would return to Germany or not. Today, the former Memel Territory is controlled by Lithuania as part of Klaipėda and Tauragė counties.
This timeline of events preceding World War II covers the events of the interwar period (1918–1939) after World War I that affected or led to World War II.
The Polish–Lithuanian War was an undeclared war between newly independent Lithuania and Poland following World War I, which happened mainly, but not only, in the Vilnius and Suwałki regions. The war is viewed differently by the respective sides. According to Lithuanian historians, it was part of the Lithuanian Wars of Independence and lasted from May 1919 to 29 November 1920. Polish historians deem the Polish–Lithuanian war as occurring only in September–October 1920. Since the spring of 1920, the conflict became part of the wider Polish–Soviet War and was largely shaped by its progress. It was subject to international mediation at the Conference of Ambassadors and the League of Nations.
The Franco-Polish Alliance was the military alliance between Poland and France that was active between the early 1920s and the outbreak of the Second World War. The initial agreements were signed in February 1921 and formally took effect in 1923. During the interwar period the alliance with Poland was one of the cornerstones of French foreign policy.
The Supreme War Council was a central command based in Versailles that coordinated the military strategy of the principal Allies of World War I: Britain, France, Italy, the United States, and Japan. It was founded in 1917 after the Russian Revolution and with Russia's withdrawal as an ally imminent. The council served as a second source of advice for civilian leadership, a forum for preliminary discussions of potential armistice terms, later for peace treaty settlement conditions, and it was succeeded by the Conference of Ambassadors in 1920.
The Klaipėda Revolt took place in January 1923 in the Klaipėda Region. The region, located north of the Neman River, was detached from East Prussia, German Empire by the Treaty of Versailles and became a mandate of the League of Nations. It was placed under provisional French administration until a more permanent solution could be worked out. Lithuania wanted to unite with the region due to its large Lithuanian-speaking population of Prussian Lithuanians and major port of Klaipėda (Memel) – the only viable access to the Baltic Sea for Lithuania. As the Conference of Ambassadors favoured leaving the region as a free city, similar to the Free City of Danzig, the Lithuanians organized and staged a revolt.
The partition of the Ottoman Empire was a geopolitical event that occurred after World War I and the occupation of Istanbul by British, French and Italian troops in November 1918. The partitioning was planned in several agreements made by the Allied Powers early in the course of World War I, notably the Sykes–Picot Agreement, after the Ottoman Empire had joined Germany to form the Ottoman–German Alliance. The huge conglomeration of territories and peoples that formerly comprised the Ottoman Empire was divided into several new states. The Ottoman Empire had been the leading Islamic state in geopolitical, cultural and ideological terms. The partitioning of the Ottoman Empire after the war led to the domination of the Middle East by Western powers such as Britain and France, and saw the creation of the modern Arab world and the Republic of Turkey. Resistance to the influence of these powers came from the Turkish National Movement but did not become widespread in the other post-Ottoman states until the period of rapid decolonization after World War II.
The Sejny Uprising or Seinai Revolt refers to a Polish uprising against the Lithuanian authorities in August 1919 in the ethnically mixed area surrounding the town of Sejny. When German forces, which occupied the territory during World War I, retreated from the area in May 1919, they turned over administration to the Lithuanians. Trying to prevent an armed conflict between Poland and Lithuania, the Entente drew a demarcation line, known as the Foch Line. The line assigned much of the disputed Suwałki (Suvalkai) Region to Poland and required the Lithuanian Army to retreat. While the Lithuanians retreated from some areas, they refused to leave Sejny (Seinai), because of its major Lithuanian population. Polish irregular forces began the uprising on August 23, 1919, and soon received support from the regular Polish Army. After several military skirmishes, Polish forces secured Sejny and the Lithuanians retreated behind the Foch Line.
René Massigli was a French diplomat who played a leading role as a senior official at the Quai d'Orsay and was regarded as one of the leading French experts on Germany, which he greatly distrusted.
On 20 March 1939, Nazi Germany's foreign minister Joachim von Ribbentrop presented an oral ultimatum to Juozas Urbšys, foreign minister of Lithuania. Germany demanded that Lithuania give up the Klaipėda Region which had been detached from Germany after World War I, or the Wehrmacht would invade Lithuania and the de facto Lithuanian capital Kaunas would be bombed. The Lithuanians had been expecting the demand after years of rising tension between Lithuania and Germany, increasing pro-Nazi propaganda in the region, and continued German expansion. It was issued just five days after the Nazi occupation of Czechoslovakia. The 1924 Klaipėda Convention had guaranteed the protection of the status quo in the region, but the four signatories to that convention did not offer any material assistance. The United Kingdom and France followed a policy of appeasement, while Italy and Japan openly supported Germany, and Lithuania accepted the ultimatum on 23 March 1939. It proved to be the last territorial acquisition for Germany before World War II, producing a major downturn in Lithuania's economy and escalating pre-war tensions for Europe as a whole.
The League of Nations was established with three main constitutional organs: the Assembly; the Council; the Permanent Secretariat. The two essential wings of the League were the Permanent Court of International Justice and the International Labour Organization.
The Klaipėda Convention was an international agreement between Lithuania and the countries of the Conference of Ambassadors signed in Paris on May 8, 1924. According to the convention, the Klaipėda Region became an autonomous region under unconditional sovereignty of Lithuania.
International relations (1919–1939) covers the main interactions shaping world history in this era, known as the interwar period, with emphasis on diplomacy and economic relations. The coverage here follows the diplomatic history of World War I and precedes the diplomatic history of World War II. The important stages of interwar diplomacy and international relations included resolutions of wartime issues, such as reparations owed by Germany and boundaries; American involvement in European finances and disarmament projects; the expectations and failures of the League of Nations; the relationships of the new countries to the old; the distrustful relations between the Soviet Union and the capitalist world; peace and disarmament efforts; responses to the Great Depression starting in 1929; the collapse of world trade; the collapse of democratic regimes one by one; the growth of economic autarky; Japanese aggressiveness toward China; fascist diplomacy, including the aggressive moves by Fascist Italy and Nazi Germany; the Spanish Civil War; the appeasement of Germany's expansionist moves toward the Rhineland, Austria, and Czechoslovakia, and the last, desperate stages of rearmament as another world war increasingly loomed.
The United Kingdom and the League of Nations played central roles in the diplomatic history of the interwar period 1920-1939 and the search for peace. British activists and political leaders helped plan and found the League of Nations, provided much of the staff leadership, and Britain played a central role in most of the critical issues facing the League. The League of Nations Union was an important private organization that promoted the League in Britain. By 1924 the League was broadly popular and was featured in election campaigns. The Liberals were most supportive; the Conservatives least so. From 1931 onward, major aggressions by Japan, Italy, Spain and Germany effectively ruined the League in British eyes.
The Rue Nitot meeting was an important First World War event, when the British Empire delegates at the Peace Conference in Versailles got together to register the harsh terms of the Treaty of Versailles, and tried to soften the conditions for peace with Germany. The meeting was held at Prime Minister David Lloyd George's flat, 23 Rue Nitot, in Paris, on June 1, 1919.
