Possess the gates of your enemies. When her family blessed her like this, Rachel could appreciate it, but our cities don't have gates... I've learnt that if you demolish the gate of your enemy in Empires, you can enter their town at will. If you build your own gate, they can't use it! You can drive your enemy out of their town and they can't come back, cos the gates are yours! So you can use the walls they built for your benefit, at no cost to you. And they can't attack their own walls!