Ezekiel Chapter 38, Gog Prince of Rus (Russia) of the land of Magog.
The book of Ezekiel foretells a day after Israel is gathered from the nations in the "Last Days" how the an invasion from the North will be defeated by God. The armies involve an Russian and Islamic invasion against the land of Israel.
God defeats these nations to demonstrate to the world his Holiness and the evidence of His Word.
After Russia and Israel are defeated, the nation of Israel will build the Third Temple, bringing the "Tribulation" on the whole world.