The game as designed is intended to keep Spain and Turkey neutral.
The only way Spain or Turkey can become active is if Germany attacks them. Allowing Spain or Turkey to decide their alliances is too likely to unbalance the game, which is why the rules were set they way they are.
Because only Germany can declare war on Spain or Turkey, it makes sense for a non-Axis player to play those two powers. (Otherwise the Axis player could build nothing in Spain and Turkey or disband all their units and then declare war and walk straight into the country and conquer them, unopposed.)
From the point of convenience, it works fine if Britain plays Spain, Norway and Turkey because their turns follow straight on to Britain. If that seems too unnatural, it wouldn't matter if Russia played them either, as their turn comes right before. Players are of course free to come up with their own negotiated alternatives but the recommendation for Turkey and Spain to remain neutral and be played by a non-Axis Regime is the tried and tested method.
Norway has been conquered already so they can do nothing until one of their cities is liberated. They begin the game already allied to Britain, the US, France and Commonwealth, and at war with the Axis powers.
Inactive Spain and Turkey can do nothing except production and moving within their home country. The player controlling Spain and Turkey can move their ships but they must return to a port in their home country at the end of the turn (no sailing all over the map doing recon).
In multiple test games this arrangement has proved to work OK. The relevant rules can be found on page 21 of the game manual.
< Message edited by icym -- 5/25/2017 1:25:35 AM >