It sucks. I'm just minding my own business and some jerk attacks me, and because they won't talk peace until either I pay them or I swup them, so I send my army to go take care of business. And so since I'm at war I decide to snatch a strategic city, or even just hold one to hand back at the end of the war. Next minute the whole world denounces me because I'm a warmonger. They started the fight, I'm just defending myself! Now the stupid Greeks won't give me right of passage so my Navy's stuck unless I go take that Greek city, then they will really hate me.