Girls' Frontline: Global Operations

I'm here for only three things: break the sword, break the sword, and break the damn sword! If you were given an army far surpassing all other military forces in the world, and the ability to travel to other worlds, which world would you choose? Obviously, the protagonist, Lin Hui, has the answer. As a seasoned second-time gamer, how could a kid fed on swords not go to rescue his wife?