[mac5732]

how bad do you need the treaty with him? that might dictate what you do. If you really don't need it, break it, see how he reacts, if he wants it back, negotiate about his ships. If not, build intel centers and steal a few of his ships/planets, but this could lead to war. Are you prepared if a war breaks out? Just remember if you use intel on him, he will more then likely recipricate. I have this type of war going on now in a hotseat game where we have trade and research with 1 human player but we are fighting with intel against each other...good luck

just some ideas mac