Germans
British
Britain
Explanation:
The paragraph shows the conflict America would have had<u> during the first world war where the moral stance of the warring countries were less in black and white</u> and USA could not decide if one side was completely wrong.
This was because of the d<u>ifferent populations in the USA which came from many parts of Europe and retained a little of their ancestral loyalties</u>. Thus, the loyalties here were a little divided in the people of the US.
Some think it was called this because of how the skin turned dark at the late stages of the disease, but it was more likely called "Black" to reflect the dark and horrible time in history.
