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Militarism is one of the main causes of World War 1. Militarism is when a country's government believes that they should maintain a strong military that is prepared and and able to defend against an attack. Militarism was most popular in Germany and Europe leading to the arms race in the early 1900's

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Alliances were another cause of World War 1. An alliance is an agreement between two or more parties for some type of gain. Conditions to an alliance are put into a document with details of what the agreement means to each party. Germany, Italy, and Austria-Hungary were all part of an alliance. Britain, Russia, and France were also part of their own alliance. Many alliances were formed in secret and only sometimes released to the public.

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Imperialism is when one nation takes territory outside of their borders in order to form colonies. Britain had one of the largest empires on the 19th century.  countries would expand to the closest available territory and back then that was most parts of Africa.

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Nationalism is an extreme form of patriotism and loyalty. Nationalist embraced their culture and their achievements over other nations. Most nationalist were fueled by what they read in newspapers and books. The stronger some empires got the more nationalism spread like in the case of the British empire.