I had an urge to make an alternate history, which is an alien space bats scenario.
Here some worldbuilding that I made.
In another dimension, a planet is divided by 4 space filling empires. Theis are the Yokai Empire, Yaoguai Kingdom, Djinn Empire and the one we would be looking at is the Daemonic Imperial Federation or the Daemonic Imperium for short.
Their homeland is the size of Australia and their dominions (colonies) are mostly islands, this is due to losing their land-based colonies to the Eastern Empires.
The planets situation is similar to that of Gorge Orwells 1984, where they are constantly at war with another, making it an endless cycle. But the cycle has its downsides, resources are getting lower and the future seems to be bleaker as decades past by. The imperium must find a way to break out of this cycle…
That's when the development of portals, designed to the change shape and size. With tests scouting out potential dimensions, that's when they found ours… They sent out scouts to explore Earth. But the Daemons realized that time works differently. When they go back to visit, time seems to go faster, as historical periods come and go. An example is when the visit during the stone age and when they return it is bronze age. Thought during the time, the portal technology was still in development. Not to mention espionage from the other empires.
The experiments and scouting affected human history. Especially in mythology and religion.
Technology The Imperium and the other empires have advance technology. Basically, Imagine weapons of the future or hard SciFi. Examples: Daemons The daemons are mostly humanoids and each one of a unique appearence. The reason is because of alot race mixing between the daemons over the course of the imperium history.
Magic The most common types are shapeshifting and possession, basically the power of a spirit. Other types of magic are elemental magic and potion magic.
So the Daemonic Imperium is pretty much OP. So what would the world reaction be when North America is invaded by the Empire of Daemons. Annexing only America, Canada, and Mexico. What the international community due and how would this affect the cold war in the year of 1972?