Add an Occupation mode
This mode when checked will allow territories to be occupied instead of being instantly owned by the one who captured said territory allowing more depth in diplomacy games. This mode would work well in conjunction with Peace Treaties https://warlight.uservoice.com/forums/77051-warlight-features/suggestions/1088481-peace-treaties
And would allow you to take said land in a peace treaty. If the land is not take in the peace treaty it would simply go back to the original owner and any other armies left in the territory will be transferred to the nearest territory owned by the occupier.
Occupation of a territory will be shown with the original owners color as the base and diagonal lines (up, right like this "/") with the color of the occupier.
Example: Blue had his territory taken over by Green, the territory that was take over would be Blue at the base with Green diagonal lines.
Occupation of a Bonus would give a customizable amount of armies, from 100% of the Bonus armies ( which would give all the armies) to 0% (which would give none) Ex: a bonus is worth 5 armies and after being occupied with the occupied bonus setting at 50% would give 2.5 armies or 3 armies.