It’s fully free to down load and play with a few confined adverts. You can find in-app purchases, but they are all for personalisation stuff so it’s entirely optional and it doesn’t affect gameplay. You decide on which of the nations linked to the conflict you wish to play as, https://www.google.co.zw/maps/d/viewer?mid=1kcbHo1F77bpnGr5za84Y8LoBG6D1t70