Risk (the board game) style gps based strategy game.
Claim areas you visit. Areas you own will slowly produce new units that you can use to defend or claim new areas. Drop units on your areas to defend them, if your area is attacked units in neighbouring areas will help with defence while you only risk loosing units in the attacked area, thus making defending more efficient than attacking.
While claiming a free area only cost 1 unit attacking an area someone already own can be costly. As attacker you risk loosing all units that you carry with you (top right number) while defender risk loosing units in the area under attack only.
Ex: Attacker has 1000units and attack an area with 50units, however the defender has additional 100units in neighbouring areas. The outcome is victory for attacker who gains control of the area and looses 150units, defender looses area and the 50units inside it.