This is a case of where the WTS covers its behind by now saying:
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Soon, Jehovah will move the world's political elements to unite in efforts to expose and devastate the spiritual harlot Babylon the Great. (Revelation 17:15-17; 18:21)
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Likewise today, Bible prophecy indicates that militarized powers within the United Nations will see religion as a disturbing element and will act to destroy modern-day Jerusalem-Christendom-as well as the rest of Babylon the Great. (Revelation 17:12-17)
and less often:
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Revelation depicts "a scarlet-colored wild beast" that exists for a time, disappears, and then returns. (Revelation 17:3, 8) This beast is supported by world rulers. Details supplied in the prophecy help us to identify this symbolic beast as a peace organization that came into existence in 1919 as the League of Nations (a "disgusting thing") and that is now the United Nations. Revelation 17:16, 17 shows that God will yet put it into the hearts of certain human rulers who are prominent in this "beast" to desolate the world empire of false religion. That attack marks the outbreak of the great tribulation.
Personally, the UN couldn't fight its way out of a paper bag without the armies and armaments of the countries within it. That is where the power lies.
Blondie