After God pours out His wrath upon mankind, our Lord will rule, as it is prophesied:
And He shall judge between the nations and shall decide [disputes] for many peoples; they shall beat their swords into plowshares and their spears into pruning hooks. Nation shall not lift up sword against nation, neither shall they learn war anymore. (Isaiah 2:4 AMPC)
We must investigate more of the Book of Revelation to find some clues, though much may remain a mystery unless the Lord gives us a vision of that time.