Factions of WW2
Looking Back from 1945 - Factions of WW2 in Altera
And another map to build the lore further for Altera's WW2 era...
This map shows how the Second World War war played out from the perspective of the Society of Nations (SoN), who have more teeth than the analagous League of Nations did in OTL. In ATL, the SoN's measures for intervention, though not as mature as they will be by the end of the century, are enough to be activated so that a collective security mission is triggered when Germany invades Polony. Member states are compelled to either commit to the war effort with aid or directly form part of the coalition forces in the fight.
Neutrality is not an option for members of the SoN for collective security missions. States who were originally sympathetic to the Axis, but who wished to bide their time, ejected themselves out of the SoN and declared neutrality.
You can see that from the beginning of the war, there were a lot more problematic factions or alliances that the SoN could not contain, but as Germany alienated its former (pragmatic) allies in the Comintern Bloc, and as the Allies successfully curried a truce between the Comintern Bloc and Norway and White russia, the tide quickly reverses for the Axis.