So I accepted an alliance with Pedro to get the eureka and he promptly moved a large army to my border and occupied two of my campuses with warriors. This lasted the entire alliance. 3 turns after the alliance ended he was still there but offered to renew which I accepted fearing a war. He promptly increased his army...and the occupying warriors have not budged. I have a great scientist I cannot use because of this. Is there any way to force him to move his warriors? Shouldn’t the warriors have been kicked out when the alliance ended? Am I going to have to resort to immediate war when the alliance ends to protect myself? Are alliances always this bad an idea?