Part of the problem in SE IV's terms is that there's no real difference between War and No Treaty. You don't have to declare war to attack your enemy; all that a declaration of war does is notify the other empires that you're fighting, via the Treaty Grid.
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Cap'n Q
My first mod!
Hypermaze quadrant
The most merciful thing in the world, I think, is the inability of the
human mind to correlate all of its contents. We live on a placid
island of ignorance in the midst of black seas of infinity, and it was
not meant that we should go far. -- HP Lovecraft, "The Call of Cthulhu"