Are these 2 maps from the same timeline? Some of the boundaries from the 2 different maps don't match - for example 1 of them shows Mongolia and the Baltic states as part of the Russian Empire, while the other shows them as having different types of government from Russia.
My first reaction is that the USA in this timeline did a lot more overseas imperialism and was much less isolationist than in OTL. It participated in the "scramble for Africa" and took a piece of southern China. In WWI, it got involved much earlier and in a bigger way, and added many of Germany's former colonial possessions to its own. After WWI, ultra-Nationalists in Russia defeated the Bolsheviks and other factions, while communists seized power in Italy and then in Germany a few years later - basically a reversal of the roles in OTL. The Great Depression hit the US even harder than in OTL, and increasing poverty plus growing opposition to the heavy US commitments to overseas colonies led to a socialist being elected in 1932. In 1933, however, the military mounted a successful coup that overthrew the socialist administration and made the US a de-facto military dictatorship after defeating most of the opposition.