Why did the crusaders invade the city of constantinople?

How did owain glyndwr meet margrat hanmer? Best basketball team ever? Did the patriots and loyalists get along? Who was the African American woman that sat down on the side of the bus of white people? What are the changes that the community has undergone? What happened to people after World War 2? Benjamin Franklin was a statesman True or False? In what language did the word boomerang originate? What were informal amendments of the US constitution? When did Hamilton Hume first arrive in Australia? Images of poor victorian adult clothing? When and where was baseball player Ryan Ludwick born? How old were the british soldiers in the Napoleonic wars? What food was not ratioed during the war but was after? Did vikings ride or have horses? Do libraries let you have drinks? How important a part did Britain play in the downfall of Napoleon? Did expansion begin in the earlier or later half of the Han Dynasty to what region did they expand? Where did the first slaves in the English colonies work on plantations? The nullification crisis of 1832 centered around what answer jacksons war on the bank?

Why did the crusaders invade the city of constantinople?