Cereal - There's a lot of discussion/usage of the teleport mechanic in SGOTMs. You might read or search some of the threads by teams like PDs, TSR, OSS, and Sun Tzu Wu's team (I forget). Try back 2 or 3 SGOTMs when I think it was used more.
All I know, in general, is I think that teleport sends your troops in the direction of your capital, but I don't know the finer details. Things seem different when your troops are further away.