Some advice, on things you might consider changing, to make a more believable alternate history scenario:
USNA:
Your timeline states that the United States are granted all BNA lands following the defeat of the British Empire during the Revolutionary War, so I have to wonder why does Winnipeg or Vancouver exist, as neither would have been founded without a British presence on the continent. Instead, they may have become New Lexington, or West Concord or something to that effect, but they surely would not have kept their British appointed names (perhaps Winnipeg may have). Also Toronto would never have existed and instead would have kept its title of Fort Rouillé or have been renamed something else.
USSR:
Looks about the usual for an alternate history USSR, but one thing....the USSR never had marines, instead they referred to their naval combat arms branch as “Naval Infantry”. Also, when it comes to some of the Chinese occupied territories, Beijing should be Beiping, and a few other cities would still have older pre-Chinese Communist Revolution names.
Libertadores:
Seems about right....I’m not sure if South American Communists would have associated themselves with Bolivar and the other great liberators(but then again, Chavez does it now, so I guess it’s plausible enough). Also, for some reasons I don’t think that a Communist South America would have Legionnaires and that smacks more of Peronist or more right-wing political entities.
German Union:
I’m totally lost at how Germany became a democratic union. More than likely, it would have stayed a conservative monarchy under the Kaiser, or at the very least transitioned to some sort of conservative oligarchy, but it seems too much of stretch for the Germans to transition to democracy without larger changes to the timeline.
Also, why’s there a Waffen SS in a democratic Germany?
Islamic Union:
Wouldn’t the Ottoman Empire have more than likely remained as the Islamic Territories would have still been under Ottoman rule, rather than being ruled by the Colonial Powers. Exceptions include North Africa which for the most part was under some semblance of colonial rule.
Visual note: Why are the Islamic soldiers wearing East Indian style uniforms?
African People’s Union:
I really can’t see the Boers, Rhodesians and white Africans at large forming a union with black African nationalists. More than likely, an African Union would either be an amalgamation of black African states united after throwing out the colonials or a white Boer led minority dictatorship of white Africans who have taken control of the former colonies following the defeat of the colonial powers.
Also, what happened to the German territories in Africa, did they lose them to revolution?
New Britain:
A rather confusing set of nations......
Why wouldn’t the Viceroy of India be the new monarch or at the very least have the Royal Family evacuated to India, since after all I’m a little confused as to why New Britain is a Presidential Democracy but yet they chose to retain the Union Jack (which is considered the monarch’s flag).
Why is Indochina part of New Britain?
New British Units: Seems almost impossible that New Britain could produce such a wide variety of modern units, with their manufacturing base being not as strong as the UK itself was. I also find it strange that the SAS was developed with no WW2.
Anyhow, in the end it’s your scenario and it’s up to you, but I would suggest making a few changes just to create a more believable timeline.