The pwning was temporary. World War I agreements made at the Treaty of Berlin (The European equivalent the Treaty of Philadelphia) and mostly based on the overseas territories. Massive reparations, must give up claims in A-L, Independence for most of her Colonies or handing them over to the winning powers. There was a brief time when Italy controlled Nice and Savoy, but it lost those in the later Interwar Years and never got those back from France.
After World War II, France and Spain were partitioned by the victors. Britain and Belgium controlled an Occupation Zone in Northern France, Germany most of Eastern France, and Italy most of Southern France. Spain was split up as well, with most of Northern and Coastal Spain going to Italy, Southern Spain to Britain, and the rest to Portugal. Eventually, the zones would be combined in 1952 to make an Independent France, but several breakaway states existed until full unification in the 1990s, among them being a Fascist state in Southern France under Italian control. Paris and Madrid would be split into zones as well. In Paris, Britain, Germany, Italy, New York, and the Soviet Union, the major wartime powers, would split Paris up until the 1990s, and Portugal, Italy, and Britain would split Madrid. New York's Occupation Zone in Paris would the Co-Governed with the British Occupation Zone until 1987, when President Cuomo handed over New York's zone to the French Government.
Corsica would be given to Italy in 1946 after the conclusion of World War 2, and while they were guaranteed Nice and Savoy, the rest of the Grand Alliance opposed such gains due to Italy surrendering to the French in World War 2.
As for China, after World War 2, the Soviets set up a Communist State in Manchuria and Korea, but the Republic of China controlled most of mainland China. It wouldn't be until 1952 that a Peace Treaty is signed during the Chinese Civil War, splitting the country in two. The Soviets, having a much tighter grip over Manchuria and Korea than they do China decide to keep those areas separate from Beijing. This causes a lot of problems, and when the Chinese Civil War reignites in the 1960s (Along with the Korean War of Unification), some bizarre politics occurs that makes the Sino-Soviet Split look like just a minor argument between Beijing and Moscow.
