Heber J. Grant, during the October 1919 General Conference report, discusses the fulfillment of some of Joseph's prophecies.
Heber J. Grant, Conference Report (October 1919), 29-30
I shall not take your time further than to refer to the Prophet Joseph Smith. We believe that he was a prophet of God, and we not only believe it but we know that he was. Why? He declared that he would be chosen, when he was a child, and he was chosen. He announced to the world that he would receive the Book of Mormon, and he did receive the Book of Mormon, which he translated from the plates, to which he was divinely directed. Eleven men, in addition to himself, bear witness that he had the plates. Eight of these men handled them and saw the engravings, and the plates were shown to three of these men by an angel of God who came down from heaven. "Oh, but," says one, "I don't believe it." But if eleven honest, reputable men testified that a man had committed murder, that man would hang all right. There is no one who can say that the statement of the witnesses regarding the Book of Mormon is not true, and there are tens of thousands who can say, by the witness of the Spirit of God, that these things are true. Joseph Smith proclaimed that he would yet be a prophet, before he was one, and he was chosen. He predicted that the Latter-day Saints would be driven from city to city, from county to county, from state to state, and finally driven from the confines of the United States to the Rocky Mountains, which was then Mexican territory. People laughed him to scorn for saying that he, whom they considered a miserable upstart, at the head of a deluded lot of people, would attract the attention of anybody to the extent that they would be driven out of a state, and particularly be driven beyond the confines of the United States. He also announced that the day would come when not only a city, not only a county, not only a state should be arrayed against the handful of Latter-day Saints, commonly called Mormons, but the day should come when the whole United States would be arrayed against them. People hooted at that statement, but the day did come when we were driven from city to city, from county to county, and state to state, and the day did come when we were driven to the Rocky Mountains, where he had said we should become a great and mighty people. And that is exactly what we have become, because in proportion to our numbers, we are a great and mighty people, and people are beginning to recognize it today. Finally the United States of America, on the statements of lying judges and others, sent an army against us—for doing what? For doing what we never did. Subsequently the government pardoned us for our sins that we had never committed, but they sent their army here all the same. And later, because of false statements made to Congress, the government confiscated all the property, both real and personal, belonging to the Church of Jesus Christ of Latter-day Saints, as if the Lord desired doubly to fulfill the prediction of Joseph Smith. I picked up the paper day after day myself, when the trial was going on here in the courts, and read in bold headlines, "The United States of America vs. the Church of Jesus Christ of Latter-day Saints" and laid the paper down and said: "Thanks be to Uncle Sam for putting the absolute stamp of divinity upon the utterances of the Prophet Joseph Smith!" This is one of the reasons why we believe in prophets—because their prophecies are fulfilled. It is only fair to say that this property was afterwards restored to the Church by acts of Congress.