Waging wars
Also I think in how the way wars are fought, war points should only be scored for occupying towns, cities etc. by sending army units into them after the enemies defences has been taken out. This will take an attacker a while to capture enough of them in order to win the war, since winning a war is about occupying another country, rather than just blowing them all up all the time. However, this could give the defender much more time to defend themselves and counter attack much more if the attacker has not organized enough specialized army units for occupation.
I'm sorry to hijack your thread like this, but I just had to post these ideas myself.