It's in the title I'll start with a Spanish invasion of Portugal (it's September 1939), and my younger brother suggested an anti-Italian uprising in Albania

In this scenario, the Soviet Union invades first, prompting Lithuania and Germany to take their claimed lands. To avoid total annihilation, the Poles would surrender some territory to the invaders

Brown - Sochi Pact (Russian breakaway states) Red - Comintern Blue - Entente Yellow - Organisation for Balkan Cooperation Light green - Persian sphere of influence Dark Green - Arab League

Thanks to Woodrow Wilson's idea of self-determination (and the pro-Germans winning the Danzig plebiscite), the Treaty of Versailles would be more lenient; the Austrian Painter wouldn't be as popular as in our timeline Here's the map I created:

Ethnic similarities

but why would Britain be allied with Germany, they were on opposite sides

Germany: We have defeated Russia! That one pocket of resistance: I don't think so...

They're not Germanic or Muslim, so they joined neither alliance

Basically to summarise what's happening in the map below, Russia's quickly falling apart, the ottomans had a coup, the french went into a civil war, Austria-Hungary was violently killed, and germany is all.

greece be built different

The Alliances are the Germanic League (yellow) and OIC (green)

If WW1 ended in a stalemate... let the map explain