Assuming you mean a crusade:
Crusades were religious calls of duty to the Roman Catholics in Europe during the the medieval ages. They were called by the Popes to capture certain towns controlled by those who were against the religion. Crusades were most commonly held on the middle eastern coast, and the most common city was Jerusalem.
The last answer was incorrect.
Venice, Italy.
a knight became a crusader when he rode with the armies to the holy land A crusade in Medeval Catholic Europe was called by the pope. If a knight took up the call to arms and travelled to the destination (the most famous being of course Jerusalem) he became a crusader knight. However any man who travelled to the holy land on request of the pope was a crusader, even peasants. people often went on crusade for the promise of pludering the rich Islamic States but also because it was told that any man who died on cursade would have all his sins forgiven and gain acess to heaven
The Children's Crusade of 1212 was a popular religious movement led by children and young adults to reclaim the Holy Land. It is said that thousands of children from France and Germany embarked on a journey to Jerusalem, but most were tricked or sold into slavery before reaching their destination. The outcome of the crusade was tragic, with most of the participants either dying or being enslaved.