In Aug 14 2018
The U.S. established diplomatic relations with Colombia in 1822,following in its independence with Spain
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According to google translator apartheid is " (in South Africa) a policy or system of segregation or discrimination on grounds of race" so after all the National Party in South Africa got the power, all White government suddenly start forcing policies of racial segregation in the worst system apartheid, moreover, the system was discrimination against the Black society that was existed in South Africa between 1948 and 1994 . According to Wiki the "economic legacy and generational effects of apartheid continue to this day."It was like master and slave way of living, in which the master gets the most benefits and the slave works hard to get a small amount of wage or money to survive in hardship.
The new settlers would make war or take their land and food.
Or they could've cause the Mexican to come of their land.
100% America because WW2 not only took us out of the great depression, it also stabilized the economy, made us a world power, and we suffered no homeland damages in the war effort.
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China... the shortest answer I could possibly give...