I, the years 1918–1924 were marked by turmoil as the Russian Civil War continued to rage on, and Eastern Europe struggled to recover from the devastation of the First World War and the destabilising effects of not just the collapse of the Russian Empire, but the destruction of the German Empire, the Austro-Hungarian Empire, and the Ottoman Empire, as well. There were numerous new or restored countries in Southern, Central and Eastern Europe, some small in size, such as Lithuania or Latvia, and some larger, such as Poland and the Kingdom of Serbs, Croats, and Slovenes. The United States gained dominance in world finance. Thus, when Germany could no longer afford war reparations to Britain, France and other former members of the Entente, the Americans came up with the Dawes Plan and Wall Street invested heavily in Germany, which repaid its reparations to nations that, in turn, used the dollars to pay off their war debts to Washington. By the middle of the decade, prosperity was widespread, with the second half of the decade known as the Roaring Twenties. International relations 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 of the Soviet Union to 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 efforts at economic autarky; Japanese aggressiveness toward China, occupying large amounts of Chinese land, as well as border disputes between the Soviet Union and Japan, leading to multiple clashes along the Soviet and Japanese occupied Manchurian border; Fascist diplomacy, including the aggressive moves by Mussolini's Italy and Hitler's Germany; the Spanish Civil War; Italy's invasion and occupation of Abyssinia (Ethiopia) in the Horn of Africa; the appeasement of Germany's expansionist moves against the German-speaking nation of Austria, the region inhabited by ethnic Germans called the Sudetenland in Czechoslovakia, the remilitarisation of the League of Nations demilitarised zone of the German Rhineland region, and the last, desperate stages of rearmament as the Second World War increasingly loomed. Disarmament was a very popular public policy. However, the League of Nations played little role in