Maastricht had been a dutch exclave for some time otl too, here the dutch just never managed to connect it to their mainland because the area was basically always french or or part of the strongest german state since the pod

Idea: america does this on december 7, 1941, simultaneous mutual sneak attack. how does it effect the war?

Rumelia fell into a civil war in the 80s when the christians in the autonomous regions rebelled against the muslim elite of the country. With European support Rumelia was dismembered. Rumelia today is something of a bunker state, preparing for the onslaught a 2nd balkan war will bring.

British independence happened because the British authorities were dissatisfied with how Christburg handled the war (they were too soft) and its aftermath, and the population went along with it. European support and Heglibavian weakness made British independence a reality.

Irish independence was a result of Heglibavia conducting a genocide there in the 1970s, which led to a war with Europe.
Europe won that war, and Russia (which is kind of like the Iran of this TL) snagged Ingria.

There is no timeline, just thought a "Europe as India" map would be fun to make

The Flags of the Christian Republic of Heglibavia, and the Republic of India