In the strategy mode you have a turn based map in which you can move your enemy troops. You can also buy units, invest in different types of technology or magic trees and you can play your cards.
Once you made all your decisions you can end your turn, after which you will have to decide which combat to participate in and under which general you want to deploy your troops. There are multiple generals to choose from, each with their own story arc, strengths and weaknesses. Once you’ve made your choices the fight can begin.