@pk679 Yes, Spain is tricky. For our 1805 scenario, we created a rather complicated set of rules where France must pay an increasing amount of money to Spain (bribes) to keep it as an ally starting in 1807.
This is designed to force France to declare war on Spain at some point (otherwise it doesn’t make sense as Napoleon should have recognized). France also gets a bonus for taking Madrid and a further bonus for conquering all of Iberia.
Things are simpler in our 1812 scenario where Spain is a full coalition member with a “guerilla” economy.
Here are our 1805 rules on Spain switching sides in full:
4.3. Spain Switching Sides. During the Napoleonic Wars, Spain ultimately switched from being a French ally to becoming a Coalition member due to Napoleon’s ill-advised effort to replace the Bourbon monarchy with his reluctant brother Joseph. To simulate this historical event without making it mandatory, Spain will require French financial support (representing bribes) to remain a French ally. Because Spain is the only major country to switch sides in NATC, special rules apply.
4.3.1 At no time while Spain is a French ally can it voluntarily destroy its own infrastructure. While Spain is a French ally, a maximum of 10 French units may be present in Spanish home territory (a greater number can move through Spain but must end the turn on non-Spanish territory). However if any British or other Coalition units invade Spain, then the 10 French unit cap is lifted while the Coalition units are within Spain. Also, this cap does not apply to non-Spanish territories in Iberia or to Spanish controlled territories outside Iberia.
4.3.2 Starting turn 6, France must pay 5 euros during its purchase units phase to keep Spain as an ally that turn. Each turn thereafter, the cost of keeping Spain a French ally increases by an additional 5 euros per turn (i.e., 10 euros for turn 7, 15 euros for turn 8, etc.) up to a maximum of 40 euros per turn. These payments do NOT go to Spain’s treasury.
4.3.3 If France decides it no longer wishes to pay for Spain remaining its ally, it must announce that it will cease doing so during its diplomatic phase of that turn but cannot attack Spanish units or territories until the following turn. During the turn in which France has announced it will no longer pay for Spain’s alliance, Spain is effectively neutral and its units and purchases are controlled by the Coalition (if multiple Coalition players are playing, the British player controls Spain during its turn of neutrality). The cap of 10 French units within Spain continues to apply, but France cannot use a road movement bonus within Spain. Any Coalition units within Spain when it is effectively neutral must be relocated during the player’s diplomacy phase to any of the following locations: (1) any of the 4 nearest Coalition-controlled non-Spanish territories; (2) any Coalition transports located within 5 sea zones of the units or (3) London. The player who owns the relocated units decides where the units are placed (they may be split up however desired) and such units move normally during the turn. Any Coalition-controlled Spanish territory is held by the Coalition player until the next French diplomacy phase at which time it reverts to Spanish ownership.
4.3.4 During the turn when France can commence hostilities against Spain (the turn after it ceases payments), if French and Spanish units are both within a territory with a fortress, all such units are considered within the fortress and no sieges are necessary to attack the defending units.
