European Imperialism was a period of colonial expansion. It is the most important cause of WW1 because it built tension between the countries. It caused Tension between Nations and Countries. Was a cause of WW1 by separating from where they stand to form another empire away from their old empire, to avoid dictatorship.
<span>to build military strength to deter aggression</span>
<span>It showed that the Union's 3-way plan might succeed.</span>
The Jay Treaty was between the USA and Great Britain
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B. Morse created the telegraph in the United States in 1837.
