Occupation of Constantinople happened on 1918-11-13.
The occupation of Greece from the fall of Constantinople in 1453 to the Ottoman empire until Greece's Independence in 1824.
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Occupation of Gori happened on 22-08-13.
Occupation of Cullaville happened on 1993-04-22.
Occupation of Poti happened on 2008-08-19.
Occupation of Estonia by the German Empire happened in 1918.
British occupation of the Faroe Islands happened in 1940.
Haitian occupation of Santo Domingo happened in 1822.
United States occupation of Veracruz happened in 1914-04.
Iraq under U.S. Military Occupation happened in 2003.
United States occupation of Haiti happened on 1915-07-28.
Because they disobeyed his orders to not attack fellow Christians in Constantinople. The fourth Crusade was supposed to be an attack on Jerusalem to liberate it from Muslim occupation. Once the Crusaders turned towards Constantinople, it no longer was a just military operation.