As a Knight, How Am I Supposed to Survive in This World?

It is July 7, 2019, ten years after the Great War. The Eastern Imperial Axis, Europe's Mandate, North America's Entropy, and Antarctica's Chaldea are all doing their utmost to preserve world peace. But this godforsaken world was never meant to have peace. New undercurrents are stirring. The world is about to fall into darkness, order is on the verge of collapse, and the people have nowhere left to go...

"But what does any of this have to do with me?" the man said.

PS: Just read the synopsis for fun.

PS2: I'm a newbie, so please be kind.

PS3: Are all the tags right?