We have updated our Community Code of Conduct. Please read through the new rules for the forum that are an integral part of Paradox Interactive’s User Agreement.
You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
I don't know if this was already answered in the stream, but do planets that have been occupied in wartime have increased unrest (i.e. the French Resistance) while they're occupied? That would add incentive to leave behind armies instead of just packing them up and shipping them off to the next target.