Passage: In 1096, Robert formed an army and left for the Holy Land on the First Crusade. At the time of his departure he was reportedly so poor that he often had to stay in bed for lack of clothes. To raise money for the crusade he mortgaged his duchy to his brother William for the sum of 10,000 marks.

Question: How did Robert fund the creation and activities of his crusade?
he mortgaged his duchy to his brother William