Game of Thrones: Starting with a Lord's Troop-Raising System

Transmigrate into Game of Thrones and A Song of Ice and Fire. Become a lord in a border town in the Kingdom of the North, build a sanctuary, and quietly raise an army. Winter is coming!? The White Walkers are at the gates!? Night King, dragons, all of you will submit! I will defend the North! I will rule the continent of Westeros! The Three-Eyed Raven will never control the world! I will conquer the continent. My journey leads to the stars and the sea!