Coronado's exploration led to land discovery, mistreatment of American Indians, and the spread of Christianity. He traveled through the American Southwest including the Grand Canyon. Coronado killed the American Indian slave because they never found the gold he told them about. When he returned to Spain, he was charged with the mistreatment of American Indians. Only the priests were happy about his exploration. It gave them a chance to spread Christianity to the American Indians. Coronado returned to new Spain. He was charged with bad leadership as well as the mistreatment of American Indians.