The correct answer to this open question is the following.
The factor that played in the United state enjoying economic prosperity during the roaring '20s was that the country did not incur in big amounts of debt during World War 1, as Europeans countries did. Indeed, the United States loaned big sums of money to Western European countries to support the war effort. That is why the United States could live a period of economic prospeity in those years called "the Roaring 1920s," a period in which people had money or could buy using credit all the things they needed or they liked.
Countries that sided with Germany in World War 2 was Italy, Japan, and most people don't know but Sweden did trade with the Germans during world war 2. Sweden did not partake in ww2 but they continued trade with the Germans, Italy joined the war because they sought out land and colonies, Germany wanted to undo what the treaty of Versailles did and japan wanted to rule the pacific. The United States sided on both wars with the Entente who helped France and Russia fend off against Austria-Hungary and Germany. The United States joined after the Sinking of the Lusitania.
The last truly white christmas was in 1981 when snow lay on the ground for like 21 days in december , and snow fell on 15 days
A communists. Russia was a communist nation in the 1900s