To the Fact that some people bodies were not immune to the diseases it spreaded fast
Answer:
Box 1: Soviet
Box 2: Political Commissars
Explanation:
I just did the question on PLATO and got it correct:)
If you were born in Europe in 1900 by the time you were 50 you would have experienced the first and second World Wars. In addition you would have begun to experience the early years of the Cold War, which was dominated by covert conflict and proxy wars more so than direct conflict like the World Wars.