Answer:
The Crusades were a military failure for Christianity, since Christians did not ultimately succeed in their stated goal of recovering the Holy Land from the Muslims. ... The Crusades opened up new trading markets, new ideas and new global vistas to Europeans.
Explanation:
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They new because they had satellites watching. They may have also had informants in Cuba.
East Asia and Western Europe had the biggest gain with the mongol conquest one is due to the establishing of the Silk Road. This enabled increase in the trade and overall growth of economy and technology with engineering and medicine. Middle gain the least as the depopulation due to the number of killings has decreased their capability and human pool of resource to fuel their economic growth and technological advancement.
C natural resources and agriculture
Demonstrations and protests to show solidarity with African Americans.