What was the cause of Chief Joseph's death?

Chief Joseph, the leader of the Nez Perce tribe, died on September 21, 1904, from complications related to pneumonia. His health had deteriorated after years of hardship and displacement following the Nez Perce War of 1877. He had been living in exile and struggled with the loss of his people's land and way of life. His death marked the end of a significant chapter in the history of Native American resistance against U.S. expansion.