So Australia is more than one nation? Shall we assume that the two nations, prior to Japanese arrival, were not of the same empire? Perhaps Holland acquired Australia East and the British own Australia West, hence the decision by Japan not to invade.
Is Brazil split between communism, or has Spain invaded and a new leader emerged to rally Brazil against the invasion?
Japan must have grabbed the Soviet areas prior to the 1930s, or Stalin would be toast. For Germany, this likely means the Red Army is much more experienced and battle-hardened, probably a better officer corps too.
Oops, sorry, Spain is communist? That would certainly alter German plans vis a vis USSR. No two-front wars if possible.
Clearly the US actively favored Quebec independence as a useful tool, hence the expansion of Quebec, perhaps now favoring French immigration to strengthen it further. The British kept a few scraps, or are those separatist movements under American influence?