Responding to xenophobic concerns, Congress passed an emergency law restricting immigration in 1921. Among other provisions, the Act established a quota (a proportional share of a total) for nationalities on the basis of their numbers in the U.S. in 1910.
The missing detail is: a quota.
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Most of the battle sites were located near water, including rivers, lakes, or ocean. American and British armies traveled by boat, so battles occurred near the bodies of water they were traveling on.
Answer:
Albania, Bulgaria, Czechoslovakia, the German Democratic Republic (East Germany), Hungary, Poland and Romania
Spices (a luxury good) among other things, but spices is the most important
