Even this nation will be on the very verge of crumbling to pieces and tumbling to the ground, and when the constitution is upon the brink of ruin, this people will be the staff upon which the nation shall lean and they shall bear the Constitution away from the very verge of destruction. Then shall the Lord say: Go tell my servants who are the strength of mine house, my young men and middle-aged, etc., Come to the land of my vineyard and fight the battle of the Lord. Then the Kings and Queens shall come, yea the foreign saints shall come to fight for the land of my vineyard, for in this thing shall be their safety and they will have no power to choose but will come as a man fleeth from a sudden destruction. I know these things by the visions of the Almighty.

( Source:

Joseph Smith, Joseph Smith Collection – from an address given July 19 1840