You could say it was the apocalypse.
War had broken out across the entire world thanks to petty arguments over practically nothing among the countries. Threats were made, and carried out over time as things grew worse.
There was no clear starting point, everyone was angered over small things, which led to disagreements and altercations. Countries that had been friends for centuries grew apart and fought more often. Countries that were already infuriated with each other began to admonish war. Secret alliances were made and deceitful rumours were spread. Some countries had even turned on the ones who created them, raised them. Either way, nobody was to trust with war and violence spreading like wildfire.
So yeah, peaceful times were coming to an end.
And only the ones willing to do anything to get to the top would survive.
