Nationalism and imperialism were major factors to the world war 1. that lead to some conflicts between nations. imperialism also contributed to start world war 1 because the European nations attacking and conquering different areas of Africa and Euro nations attacking other Euro nations for African Territory.
Middle Ages.
The period of European history extending from about 500 to 1400–1500 ce is traditionally known as the Middle Ages. The term was first used by 15th-century scholars to designate the period between their own time and the fall of the Western Roman Empire.
Got this Google I hope this helps :)
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I think it was because transportation was made way easier and it offered better options for people who wanted to travel. Also i believe at the time the west was rich because of the foreseen treasures such as gold found there so people wanted to travel west to get rich.
