In 1917, the Russian Revolution overthrew the tsar and contributed to Russia’s exit from the war.
Imperialism and imperial rivalry provided both a cause and context for World War I. Imperialism is a system where a powerful nation controls and exploits one or more colonies. Colonies can also be invaluable sources of cheap labour, agricultural land and trading ports.
The raw materials and natural resources such as sugar, tobacco, rice and cotton
Answer: Outside Invaders Threatened Border Areas
Explanation: There were string of military losses sustained against the Germanic Tribes. Rome has been at constant war with the Germanic Tribes for centuries and by 300 AD, a Tribal group called the Goths had encroached the borders of the Roman Empire. In the year 410, Visigoth King Alaric sacked the city of Rome. Then the Vandals tribe sacked Rome in 455 as well. It was in 476, when the Germanic Leader Odoacer staged a revolt and deposed of the Emperor Romulus Augustulus. It is at this moment that Western Rome falls and the Medieval Age begins as Europe falls into a dark age.
