Answer: U.S intervened after the Japanese bombed pearl harbor.
Explanation:
Joseph Raymond "Joe" McCarthy was conceived on November 14, 1908, close Appleton, Wisconsin. In 1946 he was chosen to the U.S. Senate, and in 1950 he openly charged that 205 communists had penetrated the U.S. State Department. He ascends to control as a government official by making unreliable assertions.
Ancient Greece was located in the Mediterranean region known as the Aegean Sea, this civilization was formed by 4 different geographic areas: 1) Peloponnese, this area was located in the southwestern peninsula and it only had a small part of land that connected it to the mainland, a famous city-state of this region is Sparta. 2) Central Greece, this area was above the Peloponnese, a famous city-State from this region is Athens. 3) Northern Greece, this big area grew -towards northeastern land thanks to conquest campaigns and was divided in 3 different sections: Thessaly, Epirus, and Macedonia. 4) A numerous groups of islands located in the Aegean Sea formed the last geographic area.
As the question says, the mountainous territory served as protections against invaders, but it also meant it was not easy to travel by land between regions, and that each city-State formed a particular way of life and culture. The regionalism in ancient Greece also implied a constant internal conflict between city-states like Sparta and Athens, and the inability of having a central government because of the big differences and conflicts between population.
Assuming you are talking about the second world war Germany formed an alliance of sorts with Russia to ensure safety on its eastern border (a lesson learnt from the first world war). After Germany had captured France they were then able to turn to Russia (Germany had no intent of remaining allied with Russia). At the time the Germans considered the Russians inhuman like everyone else and therefore should be destroyed.
If this isn't the second world war please tell me.