1187
A General named Saladin led the Muslim Army to retake Jerusalem and the Holy Land from the Crusaders.
Saladin took Jerusalem in the Second Crusade, specifically in October of 1187. In the Third Crusade, Saladin started off in control of Jerusalem and Richard the Lionheart abandoned his marches on Jerusalem upon signing the Treaty of Jaffa. As a result, Saladin never lost control of Jerusalem during the Third Crusade and never had to retake it.
1187
Jerusalem fell to Muslim forces under Saladin.
Retake Jerusalem
Saladin captured the Christian but then let them return back to their native lands
Saladin
Saladin .
The question does not make much sense. Christianity is a religion; it cannot be seized. If the question is trying to ask when Saladin seized Jerusalem from the Christians, it Saladin reconquered the city on 2 October 1187, when the (Christian) Kingdom of Jerusalem relented after two week siege.
Saladin was not in a crusade. He was a great Muslim commander who fought against the crusades of the christians who ruled Jerusalem.
He took over Jerusalem but was bad