Assassins Creed: Survival

Based of a series of dreams I've been having for months.
A young fan of Assassins Creed tries to bring the Creed to the real world after a long list of unfortunate events that has brought humanity to its knees.
After leading his small town through an apocalypse a young man has to try to prepare his town for a new threat. Other community's have turned on each other and are trying to become empires. With surrounding communities under the command of believers of the Templar way and the Templar leaders trying to fight their way to Grandmaster. He decides to train his towns people and launch offensives to rid the towns of there Templar leaders.
After gaining some territory and followers he finds out that most countries have regained their footing. Most of those countries are under Templar order. He must try to make the Assassins more powerful but do so without civilians finding out that this is more than just a move for territory.