I wonder how Canada can be made a Brittish vassal?
IIRC a vassal alvays break away when reaching a size in land, oruginal land and population compared to its master.
Which makes sense if Britain lose several territories when WW1 ends. We should still try to see which territories will be made vassals and which will be fully integrated for the vassals not to break as soon as the map starts.
It's a good point sogroon, and will need to be seen carefully.
If I can take a look at some things deeper in the code, maybe we can make Commonwealth nations AI be more friendly and passive to britain.