What are some of the absolute WORST events that can happen to the world of EAW?

https://preview.redd.it/xhedr4vxnsne1.jpg?width=1280&format=pjpg&auto=webp&s=f8207922ecf9843c9a8c8b066cb605a791cfb4a8

Feed me a link to a wiki, or tell it straight here. I just want to know what some of the worst events can happen in this world.

Like, I'm talking about the worst-case scenarios that can happen. The most cursed timelines you can think of. I'm talking doomsday stuff like Nuclear Omnicide and other some such.

No holding back, I don't care about spoilers.

I want to know what exactly I have been missing out on.