Here's the idea: somehow avoid major European wars in the 20th century, with a PoD before 1900.
Perhaps there is a major European war in the late 19th century that involves all major powers, which leads to an earlier start of European integration, leading to a sort-of European Union or at least Coal and Steel Community in the 1930s? I know that any war before the advent of modern machine guns, barbed wire and artillery would not make this proto-Great War that bloody, but a long war in the 19th century would be able to cripple European economies enough for them to slowly start to warm up to each other, eventually forming an early EU.
Go crazy
Perhaps there is a major European war in the late 19th century that involves all major powers, which leads to an earlier start of European integration, leading to a sort-of European Union or at least Coal and Steel Community in the 1930s? I know that any war before the advent of modern machine guns, barbed wire and artillery would not make this proto-Great War that bloody, but a long war in the 19th century would be able to cripple European economies enough for them to slowly start to warm up to each other, eventually forming an early EU.
Go crazy