Iirc, alliances in WW2 were quite messy and with a tendency to be broken at least partially, some notable ones I remember:
The Soviet-Nazi Friendship Pact, Hungary helping Poland despite being allied with Germany, Poland being forced to declare war against Japan which they considered a friend nation, Brazil approaching Germany despite being allied with the US, China afaik also being allied with Germany but with Japan at their throats, and Finland allying themselves with Germany just to fight the Soviets.
Iirc, alliances in WW2 were quite messy and with a tendency to be broken at least partially, some notable ones I remember:
The Soviet-Nazi Friendship Pact, Hungary helping Poland despite being allied with Germany, Poland being forced to declare war against Japan which they considered a friend nation, Brazil approaching Germany despite being allied with the US, China afaik also being allied with Germany but with Japan at their throats, and Finland allying themselves with Germany just to fight the Soviets.