Also, you get a NoSuchElementException when doing a battle with the UK-aaGun unit:

In this battle, I gave the British infantry, tank and aaGun the ability to retreat on the first round of combat.

When choosing to retreat and selecting a territory, it immediately throws NoSuchElementException and the game crashes. I think that is caused because there is a phase where the aaGun shoots at the air units and that comes after the phase where the British decide to retreat. This results in a phase where the aaGun cannot shoot at the air units. I think it's better to move the decision to retreat for the defender after AA fire, according to the North Africa rules.

In other words, "British withdraw?" should come below "Germans notify AA casualties".

Another bug, air units don't retreat along with the other units. They just stay in the territory. I think it is copying the logic for attacking air units. But retreating defending air units requires the same logic as retreating land units.

Also, minor request but it would be nice if the decision for the defender to retreat is displayed here if it's made at the start of the combat round, so that it says "British decide to retreat units" as the first entry in this battle history.

@iratoric

I just did a combat with infantry having the ability to defensively retreat in North Africa and it is looking really neat! It is working almost exactly as intended.

I discovered a minor bug though and that is that units are able to retreat to territories they are not allowed to enter because of relationships. All the territories in capital letters are controlled by the player Mines, which is neutral towards the British. I am able to select such a territory and retreat to it. This should not be possible:

For the attackers, this is working correctly.