From 1933 to 1945, Nazi Germany carried out a campaign to “cleanse” German society of individuals viewed as biological threats to the nation’s “health.” Enlisting the help of physicians and medically trained geneticists, psychiatrists, and anthropologists, the Nazis developed racial health policies that began with the mass sterilization of “genetically diseased” persons and ended with the near annihilation of European Jewry. With the patina of legitimacy provided by “racial” science experts, the Nazi regime carried out a program of approximately 400,000 forced sterilizations and over 275,000 euthanasia deaths that found its most radical manifestation in the death of millions of “racial” enemies in the Holocaust.
Spain's government of its colonies in the Americas was divided into various system. One of them was the Viceroyalty of New Spain and the other one was named the Viceroyalty of Peru 1542.
Using those systems allowed Spain to hold more grip into its new land but also it helped prevent rebellions or conquests from other countries.
Slavery was legal in Texas under the state's Constitution. When Texas became a state, another "slave state" was added to the country.
Answer: The Soviet Union had shown that it wanted to expand its area of control in Eastern Europe.
Additional detail regarding NATO:
The United States, along with Canada, joined with ten European countries in signing the North Atlantic Treaty in 1949. This created the North Atlantic Treaty Organization (NATO), which was a defensive military alliance of democratic states over against the expanding threat of communism felt in the Cold War environment.
The ten original Western European members of NATO were the United Kingdom, France, Belgium, the Netherlands, Denmark, Norway, Portugal, Italy, Iceland, and Luxembourg.
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