The emperor Alexis's III, caught completely unprepared by the arrival of the crusaders, fled the city on 17 July 1203 CE
The crusader army arrived outside Constantinople on 24th of june 1203 CE. The force consisted of around 4500 knights, 14000 infantry and 20000-30000 veterans
12 april 1204
A slaughter of the defenders and the city's some 400,000 inhabitants followed. Building were torched and churches desecrated. 3 days of looting followed where artworks were destroyed, precious goods were melted down, and religions relics were taken back to europe
The crusaders attacked the weaker sea walls of the harbour and targeted 2 towers in particular by lashing their ships together and ramming them repeatedly. Initially, the defenders of Constantinople held on. But eventually, the attackers forced their way through on the seaside and smashing through the city's gates.
On the 9th of May 1204 CE, Count Baldwin of Flanders was made the first Latin Emperor of Constantinople and crowned in the Hagia Sophia