Unplaytested. Use at your own risk if you’re really really bored with the OOB game. Adds way more time to setup than is probably worth it.
1.1 Neutral Bribing
Three neutral nations are bribable: Sweden, Turkey, and Argentina (begins pro-Axis). At the start of its turn (before purchasing units), Germany may initiate a bribery bid. The US, UK, German, and Italian nations will secretly write down their bid for each of the three nations and then reveal them. If, for any one nation, one side outbids the other by 10 IPCs or more, they have won the bribe, and that nation will change allegiances.
All money bid must be paid to the bank.
1.2 Dynamic Neutrals
Europe, highly-divided and buffeted by growing German territorial aggression, is disjointed. Lines have already been drawn, and every nation looks out for their citizens only. Some hope to remain neutral; others have already decided where their affections lie.
Spain and Portugal, mutually suspicious and each already with close ties to the belligerents on the continent, do not want to go to war. However, if called to do so by their allies, they and their colonies will join the fight for Europe. Be aware: Francoist support is likely to swell in conquered France if Spain is brought into the conflict by Allied aggression.
1.2.3 Middle East
The Middle East is relatively passive and poorly armed, with the notable exception of the newly-republican Turkish nation, heir to the Ottoman Empire and resolved to stay neutral. Iraq and the large Persian Kingdom are open to a Germany hungry for their underdeveloped oil reserves and fearful of the Soviet Union to their North. The UK has strong ties to the Saudis, and in the case of Axis hostility in the area, may find an ally there if the Allies haven’t already alienated the Saudis by violating their neighbors’ sovereignty.
1.2.4 South & Central America
South and Central America is dominated by internal rivalries and the influence of the United States. Nevertheless, suspicion of the United States and affection for Fascism grows strong in the south of the continent. Argentina is overtly open to Axis influence, and Chile will become much the same if the US solidifies its ties to Brazil. Nevertheless, if the Axis obtains an actual foothold on the continent, adjacent nations are likely to seek Allied support against their neighbors.
4 Inf 2 Arty 1 AAA, NavB, MinIC, 1 DD (SZ 85) Brazil (pro-Allies): 3 Inf. If any South or Central American territory becomes Axis, all adjacent true neutrals become pro-Allies and Brazil becomes American. If any South American true neutral is attacked by the Allies, they all become pro-Axis and Argentina becomes German.
Thailand, never conquered by European powers and determined to remain that way, wouldn’t mind grabbing some land from its neighbors.