Warclicks.io is an idle clicker type of game with a war theme. You start out with very limited resources and buy an off-road, then a tank and slowly make your way to managing a small army. The goal is to ultimately automatize the unit creation process so that you wouldn't have to do anything while the army is growing on its own.
Another interesting aspect of the game is the warzone mode where you actually need to be present and earn special points on the battlefield that will help you improve your army later on.
If you like management games that don't require a lot of attention, Warclicks.io is a great option.