Why did the crusades fail?

>>882874
venice finally made byzantium irrelevant (if you pas by this post while scrolling down sacked rump states and an expanded maritime trade republic will come to you but only if you post "thank you based dandolo" in this thread)

>>882887
thank you based dandolo

Thank you based dandolo

Personal ambition (Various leaders)
Religious zeal (Pélage Galvani)
Nations interests (Venice, Genoa)
etc...

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119KB, 637x826px

>>882887
thank you based dandolo

>>882874
Really bad objective, they did a real life hail mary pass for jerusalem and just ended up getting themselves flanked

>>882874
More interesting to me is why did the first succeed but the ones that followed did not. You would think it would be easier once you had a solid foothold