This was brought up in another thread, but I felt it deserved it's own. I also haven't seen it elsewhere.

How about the ability to move through the territory of a person that has a treaty with you so you can give them aid or move to the other side with out taking their territory (ie: No color change). Or you could even make it a separate treaty so that you can still make a nonaggression treaty and not have to let people through.

GT2 is going to be structured very differently, so I'll finally be able to code allowing allied units onto a country's sectors.

I don't want to allow multiple units of the same country on the same sector, since it would essentially allow a country to create a super cluster of unlimited strength. The new structure will allow me to let units pass through other friendly units, though, as long as there's an open sector on the other side.

Excellent!