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Imperialism is when a country extends its power into other territories for economic or political gain.

In the 16th Century, Britain began to build its empire – spreading the country's rule and power beyond its borders through a process called 'imperialism'.

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An act or policy of expansion carried out by one state at the expense of another using an unprovoked military attack.

The Anschluss was the Nazi German regime's first act of territorial aggression and expansion.

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 More than 200,000 people were detained between 1933 and 1945, and 31,591 deaths were declared, most from disease, malnutrition and suicide. Unlike Auschwitz, Dachau was not explicitly an extermination camp, but conditions were so horrific that hundreds died every week. #

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One of the most horrific terms in history was used by Nazi Germany to designate human beings whose lives were unimportant, or those who should be killed outright.

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The French Revolution was a period of major social upheaval that began in 1787 and ended in 1799.

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The French Revolution resulted in major sweeping changes to all parts of the country. The main reason for this revolution was inequality between 3 different classes in France.

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Hitler smashed the nation's democratic institutions and transformed Germany into a war state intent on conquering Europe for the benefit of the so-called Aryan race. His invasion of Poland on September 1, 1939, triggered the European phase of World War II.

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The opinions or actions of people who believe that a country should use military methods, forces, etc., to gain power and to achieve its goals.

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Trench warfare is a type of combat in which the opposing sides attack, counterattack, and defend from relatively permanent systems of trenches dug into the ground.

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The Russian Revolution took place in 1917 when the peasants and working-class people of Russia revolted against the government of  Nicholas II.

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The revolution that overthrew the imperial government and placed the Bolsheviks in power.

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The Industrial Revolution was the transition from creating goods by hand to using machines.

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The Industrial Revolution brought massive changes in the economic and social life of people. it made it easy for massive production and increased international trade.

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The war in Italy progressed in two parts. From 1940 to the summer of 1943, Italy fought as an independent power alongside Germany. They were unhappy with the Treaty of Versailles, they thought that injustice had been done to them. So it joined the side of Japan and Germany to get its territories back.

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The empire was invaluable throughout the long years of the Second World War, from providing escorts on the Russian Convoys to fighting in the brutal Burma campaign, from providing pilots in the Battle of Britain to the invasions of Italy, Sicily, Normandy, and beyond.

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The Cold War was called cold because the featured competition between, the Soviet Union and the United States, were nominally at peace (not bombing). But citizens of both nations were never at peace because they were always worried when an attack might happen.