Hey, back off
I'm playing my first "tough" game and it is the first time I feel challenged. The AI is expanding in tech, territory and military at the same rate as I am, which is alarming because I can't get comfortable. The Altarians sent a series of fleets to a bunch of my planets along our border. I mean, these fleets are almost in orbit. Their relations with me are "warm" but I am wary of them. How do I tell them that? I would like to send a message, "remove your fleets or get ready to lose them permanently". I assume the only mechanism to deal with this is to attack. I will not simply ignore this flagrant violation of my space.