@VictoryFirst

I don't think Properties are desired from a Engine coding standpoint. That is my understanding anyway. Dan addressed it above I believe.

Edit
So would want to limit their use

@RogerCooper Thanks. IIRC, I think WWI 1914 also has defending submarines that can retreat.

@Cernel I think it's probably possible to implement a more customizable defensive retreat feature in TripleA, with a bunch of Game properties. Map-makers could decide themselves if they want to implement A&A-based retreat rules or come up with their own. It could be easily expanded by creating more properties.

The A&A retreat system might be silly, but I think it's even more silly to ignore it completely and make it not supported. Players that want to play A&A, want to play A&A, and not with altered/changed rules that might make more sense (not speaking for everyone here, of course there are people who like to play with house rules. But at least, the original rules should be supported).

@VictoryFirst said:

Have read quickly through this thread, noticed something about "units should not be able to use retreat to move more quickly". I am not sure what's exactly meant by this, but if we look at G40 where Germany can attack Yugoslavia using units in Romania and Greater Southern Germany, and retreats after one round of combat to Romania, the infantry in GSG also retreat to Romania and have technically moved two spaces. This should not be disallowed but is a feature of the rules. So the defensive retreat should also allow this (again, not sure if I understood this correctly).

I pointed that out firstly. Obviously, that (as well as indeed moving faster via retreat, which could be addressed with a better retreat system or with units having greater non-combat movement) makes no sense and is silly.

You might have missed that this whole thing started (by @iratoric) as an advanced rule for TripleA games in general (not as a port of any particular existing game).

Eventually, @iratoric changed his (assuming gender) mind, and now instead he is going for supporting North Africa, thereby of course implementing existing rules. At this point, of course, it does not matter how good or bad such rules are, so you are indeed right that it is nonsense to discuss whether or not rules make sense.

I think it's unfortunate that North Africa or any such games with a retreat system exist. If they did not, this could have been a very interesting community effort to have some very good retreat rules rather than implementing and supporting this or that more or less flawed retreat system of this or that game.

However, I still hope that properties or somesuch may be made to have alternative versions of such rules rather than hardcoding it all mandatorily working as per North Africa rules or whatever. The more the system is customizabile by map-makers and game-makers, the better.

@VictoryFirst East & West has the ability for tanks to withdraw from a captured are in non-combat but no retreat. Axis & Allies & Zombies has no defender retreat (except for subs)