Description: After making peace with an AI and the player returns some of the AI territories, the player units will get stuck. The units cannot be moved or slept, so the only option is to manually press "skip" each turn for each unit until you declare war again.

Attachments:

Steps to Reproduce: 

1. Declare war on AI

2. when close to winning place some units in disputed territory 

3. Make Peace with the AI and return the territory to the AI

4. Try to move the units - should not be possible

Expected Behavior: Either the units should be moved outside the AI territory automatically or the player units should be movable freely even if this means grievances