The Soviet Union.
Throughout most of the 1900s, including during World war II, Russia was known as the Soviet Union, or the USSR.
PRI
Poland, Russia, Italy, England, Finland, Greece, China, Japan,
Most likely tribal wars.
W.E.B Dubois
Rats and pigeons were the most popular animals used for psychological research during the mid 1900s. They were commonly used in studies related to learning, conditioning, and behavior.
Asians
PRI
Russia is a part of Europe. Most of its population lives in European Russia and it has always been linked to Europe historically and culturally. The Russian Empire always had control of Western Europe up until the late 1900s.
The Soviet Union, the USSR, Russia.
The most powerful leader in Russia during World War I was Nicholas II. In addition, Nicholas Nikolaevich and Aleksei Brusilov were leaders during WW1.
Russia