Alma 46:12-13
. . .And it came to pass that [Moroni] rent his coat; and he took a piece thereof, and wrote upon it--In memory of our God, our religion, and freedom, and our peace, our wives, and our children--And he fastened it upon the end of a pole. And he fastened on his head-plate, and his breastplate, and his shields, and girded on his armor about his loins; and he took the pole, which had on the end thereof his rent coat, (and he called it the title of liberty) and he bowed himself to the earth, and prayed mightily unto his God for the blessings of liberty to rest upon his brethren, so long as there should a band of Christians remain to possess the land--”
Alma 48:11, 17
And Moroni was a strong and a mighty man; he was a man of a perfect understanding; yea, a man that did not delight in bloodshed; a man whose soul did joy in the liberty and the freedom of his country, and his brethren from bondage and slavery; … Yea, verily, verily I say unto you, if all men had been, and were, and ever would be, like unto Moroni, behold, the very powers of hell would have been shaken forever; yea, the devil would never have power over the hearts of the children of men.
Please know that the Holy Spirit has borne solemn witness to my soul that Captain Moroni was a historical character who once thrived upon the earth, and that the Book of Mormon, that contains his history, is the word of God.