A slightly different version of Orwell's
1984. The map shows the world in the year 1984 (big surprise!) The Oceanic Alliance is in the dark pink British Commonwealth Color, the Union of Eurasian Socialist Republics is bright Soviet red, and the East Asian Co-prosperity sphere is bright yellow. Most of the countries in all three power blocs are still officially independent, but in reality they are largely subservient to a central leadership, so their borders are shown as dotted rather than solid lines. (It takes a surprisingly long time just to turn solid black border lines into dotted lines.) A few countries, like Argentina, Chile, and Ethiopia with the Oceanic Alliance, or Thailand in the East Asian co-prosperity sphere, are a little more independent - enough to qualify as satellite states rather than integral parts of the larger alliances. These states, however, are few and far between by the later 20th century.
Grey are the "disputed areas" - frequently fought over, but with no one side able to gain the upper hand. Of course, bothy sides might be more interested in unending war than in actually getting the upper hand.
The (admittedly very improbable) POD is a successful communist revolution in Germany after WWI, which links up with the Soviets in eastern Europe, smashing Poland between them. The Baltic states are also overrun and incorporated into the Soviet Union. The alarmed Allied powers set up non-communist German states in the Rhineland and part of Hesse, but war weariness and potential unrest at home prevent them from being able to launch an all-out war against the communists. The 1920s and 1930s see a sort of earlier "Cold War" between the UK and France, backed by Fascist Italy and several anti-communist governments in eastern and southern Europe, and intermittently supported by the USA which is slightly less isolationist than OTL due to worry about the "Red Menace". Economic hard times in the 1930s increase tensions between the two power blocks, until communist Germany sends troops into Austria and Czechoslovakia in 1938 to support communist uprisings there, triggering the Second World War. The Germans and Soviets prove to be more prepared and better-led, with tactics that make better use of the newer types of military technology, and by late 1940 the communist armies have overrun most of their opponents on the continent, forcing the governments of France and Italy into exile in their colonies. The USA is unwilling to do more than supply the anti-communist armies on favorable terms, despite the intense efforts of President Willkie to persuade his countrymen that they will not be safe in the event of a communist victory. When the USA does finally declare war on the communist powers by a slim margin in the summer of 1941, it is too late. German, Russian, and allied communist forces are pushing into the Middle East, with the British, Free French, and Imperial Italian forces unable to stop them. US forces have to be committed piecemeal, and suffer several defeats due to lack of experience. Meanwhile, Japan has had the good fortune of developing slightly more far-sighted political and military leadership than in OTL. When they invade China, they are less brutal and make a stronger and more successful effort to cultivate the support of Chinese military and political leaders who are alienated from both the Nationalists and the Communists. Japan attacks UK and US forces in the Pacific in the summer of 1942, sweeping aside their depleted armies in the Phillippines, Malaya, Burma, and Indonesia over the next few months, and blocking US and Australian efforts to start a counteroffensive in 1943. In the summer of 1944, unsuccessful on all fronts, the UK, the USA, and their allies are forced to negotiate for peace with both the Russian-German led communist powers and separately with the Japanese. In the peace treaties that follow, they recognize the communist powers as dominant in continental Europe, most of North Africa, and most of Southwest Asia or the Middle East. At the same time, they recognize almost all of Japan's gains in eastern Asia and the Pacific. These peace treaties create a world dominated by three power blocs - the Communist Eurasian Union of Socialist Republics, the US-UK led alliance, which is increasingly referred to as the Oceanic Alliance due to its great naval power, and the Japanese-dominated East Asian co-Prosperity sphere. Still in the future, however, are a series of political, social, and military transformations that will result in increasing centralization and totalitarian repressiveness in all three power blocks, even in nations that had hitherto been relatively democratic.