The decades from the 1920's through the 1940's were marked by an extreme degree of political instability and conflict.
The Great War, having toppled the reigning order of the past century, was only the catalyst of more to come. The Great Depression followed, giving rise to radical movements on the far right and far left.
In Russia, the communists took over after the war.
In Germany, a communist insurrection lead to Hitler's reactionary government but was toppled by the military to re-establish democracy.
In the United States and Canada, reactionaries seized top government offices. In Canada the coup was a bloodless affair, but in America many thousands died to preserve their liberty, yet were no match for the armed forces.
In England, fascists attempted a takeover, but after the Siege of London, order was restored.
South Africa took advantage of the chaos to break free from the Commonwealth and turned to their Boer roots, using a form of white nationalism to bring Anglo colonists into the fold.
In Japan, military officers eroded the nascent democracy, until they invaded Manchuria. Preparations for a war with China were leaked however, and the militarists were purged. However, many army groups resisted and a short civil war broke out, the result being that the Kwangtung Army continued their independent control of Manchuria.
Liberia, the only free nation left in Africa, took in Socialist and Black refugees from North America, and used their abilities to create a pan-African revolution. Educated English speakers would prove useful in the new administration of former colonies. The British insurrection in London was an opportunity to liberate British West Africa. Then, an alliance with the British against South Africa to liberate the Africans from Boer atrocities. The British demanded the Liberians turn over the captured colonies, but the Liberians refused. Luckily, Italy had just declared war, giving the Liberians a good excuse to keep occupying African lands due to the war, and the British, distracted in the Mediterranean, did not press the issue.
The war continued to expand.
The Soviets and Americans both declared war on the European powers, the Soviets in order to occupy Poland against a resurgent Germany, having underestimated their new Entente with the French, and the Americans due to European interference in civil wars in Latin America.
The war took a turn for the worse when Spain suddenly joined Italy, surprising everyone with a lightning invasion of France that would see much of Western Europe occupied. Germany, fighting on two fronts, began to buckle. Romania capitulated to the Soviets. The fate of Europe hung in the balance.
Liberians, using French ports in North Africa, having just finished overrunning Italian Libya, invaded Spain through Gibraltar, eventually forcing their capitulation. This was the turning point of the war. The Germans and French regrouped and stabilized the line in Poland.
However, now that the war was coming to a close, the British, although distracted by the Americans, once again began making demands to have their African territories returned. Liberia needed a new ally that could vouch for them, and found one in Germany. Germany would guarantee Liberian territorial gains, in exchange for help against the Soviets in the Eastern Front. Liberian braves broke out through the Ukraine and captured the most Russian territory, impressing the Europeans.
Meanwhile the Japanese and Chinese took advantage of Communist weakness to make land grabs in the Far East. The Japanese took back Manchuria and some, while the Chinese crushed the Maoist rebels, who fled to the far west.
Once the Soviets capitulated in the summer of 1944, the world was mostly at peace, although there would still be heavy fighting in the Pacific as American Marines stocked up their bases in the Solomon Islands for the coming invasion of Australia...
Orange - The American League (USA, Canada)
Blue - The European Entente (Germany, France)
Teal - The British Commonwealth and Allies (UK, Portugal)
Green - The West Pacific Treaty Organization (Japan, Korea)
Pink - Liberated Africa (Liberia)