Why did the Fourth Crusade happen?

The Fourth Crusade (1202–1204) was originally intended to conquer Muslim-controlled Jerusalem by means of an invasion through Egypt. Instead, in April 1204, the Crusaders of Western Europe invaded and sacked the Christian (Eastern Orthodox) city of Constantinople, capital of the Eastern Roman Empire (Byzantine Empire).Click to see full answer. Regarding this, was the Fourth Crusade successful?Sacked on 12 April 1204 CE, Constantinople was stripped of its riches, relics, and artworks, and the Byzantine Empire was divided up between Venice and its allies. The Fourth Crusade thus gained its infamous reputation as the most cynical and profit-seeking of all the crusades.Also Know, what were the effects of the Fourth Crusade? The 4th crusade had a massive impact on the Catholic Church in a bad way because it separated the eastern orthodox and the western Church permanently. If the fourth crusade did not happen, the east and the western churches may have been able to reunite. Similarly, why did the 4th crusade fail? But instead, once Emperor Alexios was deposed and murdered by an uprising the crusaders saw this as a chance to take Byzantium for themselves and sacked Constantinople henceforth buttering relations with the Orthodox and Catholic church. This is why the fourth crusade was a massive failure.When did the 4th crusade end? 1204
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