Travel Back to the Eve of the Doomsday! Rebuild Civilization

500 Years after the end of the world, His Royal Highness the Prince of the Southern Kingdom found the secret of time and space teleportation before the Allied Forces of the Four Nations broke through the city gate, and completed the time travel under the eyes of the Allied Forces! Returning before the doomsday comes, this time, I have to make full preparations to create my own doomsday empire when the doomsday comes. Killing and conquest, the weak and the strong, watch how I use strategy and wisdom to unify all directions!