So, where do we start? 2022? 2023... oh wait, we start in 2023.
This'll go in sections by country, and within that country section, we'll have lore of the various groups and forces roaming the collapsed world.

EVENTS LEADING UP TO 2025
It's been 1 year and 2 months since the start of the Russo-Ukrainian War, and the Russian Federation, suffering inflation, economical sanctions, a huge decrease in manpower, and lost hope, the war ends with the collapse of Russia... politically. Stability drops to 0%, and total anarchy is the result. Russian-based oil companies and related businesses are closed and their worth in stocks dramatically decreases, bringing Gross domestic product (GDP) per capita to its lower point, and cost of living increases to dangerous values.

This event was called "The Cataclysm," simply just a shortened way of saying "The world is going to ♥♥♥♥♥♥♥ end because the West depend on Russian oil a lot, with no Russia there is no abundance of oil to be exported from a place so nearby."

Following the collapse of the Russian Federation, the former Soviet states collapse too, and the world is now on the brink of total pause in... a few weeks. Governments around the world are loosing grip of power, as with no oil, you cannot fuel the cars, which then you'd have no car, oh ♥♥♥♥ you have no car, how are you suppose to get someone 5 miles away, walk?
So, politicians in major European countries result to rationing oil, but I forgot to tell you, there's mass looting for supplies to survive the increasingly apparent end of the world.

It is now 2024, January 4th, and Austria collapses and lawlessness is rising around the world. Think of dominoes, one falls down and takes down another, until all them are down. This is called the 2nd Domino Effect, but instead of communism being the problem, it's the globe being on the brink of destruction by their own.

In days, several countries collapse, law enforcement is dysfunctional, and would you look at that, *civilians with firearms and bombs*... wait, CIVILIANS WITH FIREARMS AND BOMBS! A surge in terrorism arises, and now the United States is broken up into 4 republic. How convenient, anyways, the Irish Republican Army is back in action and... occupies Northern Ireland. How? Several militaries, including Her Majesty's Armed Forces, just a fancy way of saying The British Armed Forces, are not really effective now and many soldiers desert to return "home."
Speaking of terrorists, ISIS keeps a iron grip on Afghanistan, the Kurdistan Freedom Hawks do a little trolling, the Argentine Patriotic League bomb the US Embassy in Argentina, and the Atomwaffen Division are free to run wild... I hate them.
Continuing on, almost every country collapses in November, and in early 2025, the entire world is put on pause.

Everyone in 2023 thought war would end them, and it did in other ways.