(Babylonian Empire - Secret Bid for Worldwide Dominion)

Revelation 13:15 “And it (one of the Babylonian monarchs, drunk on the blood of the saints) does great signs (evidenced by a grave “Memorable Occurrence” or serious prophetic event), that even it makes (consuming) fire (of divine wrath) to come down out of heaven onto the earth before men.”

Great Sign
ISAIAH 66:19 “And I will set among them a sign and I will send from them those who escape [“from the tokens of the divine displeasure”] to the nations…”

Barnes Commentary.- A Sign. The word used here, and translated sign- means a flag, or a standard; a memorial, or any pledge, token or proof of a Divine mission, or a miracle wrought in attestation of a Divine promise or message. It was customary for miracles or prodigies (grave or serious prophetic event) to be exhibited on similar occasions.
What is its meaning here is to be determined by the connection. That would seem to me to require some such interpretation as this: That when God should come to take vengeance on His foes, and to manifest His glory, He would establish some mark or memorial; would erect some standard or give some signal, by which His true friends would escape, and that He would send them to distant nations to proclaim His truth and gather together those who had not seen His glory. What that sign should be, He does not here say. Whether a standard, a secret communication, or some intimation beforehand, by which they should know the approaching danger and make their escape, is not declared. It is by no means easy to determine with certainty on this passage; and it certainly become no one to speak dogmatically (inflexibly) or very confidently. The heavy judgments referred to may have been the impending calamities over Jerusalem. The glory of God referred to, may have been the signal manifestation of His perfections at that period in the approaching destruction of the city, and in the wonders that attended the “manifestation” of the Messiah (the “Mighty God”).
By these warnings and previous intimations they were to be preserved. The sign was “among them,” i.e., in the very midst of the nation; and the object of the intimation was, to secure their safety, and the speedy propagation (broadcast or circulation) of the true religion among them.

(Review)
911 - ARMAGEDDON – Proclamation of War on Terrorism

ISAIAH 30:25-26 “And shall be on every high mountain and on every lifted up hill, rivulets, steams of [reviving] water [of retributive measures of justice] in a day of great slaying [when human aspirations go beyond the limits of the law, in the day of great slaying] when towers fall. And the [reflected] moon light [of armed defensive combat necessitated through right and justifiable measure] shall be like the light of the sun [the law of the land in its going forth]; and the sun’s light [of divinely sanctioned retributive judgment upon the rebels- to re-establish the age old foundations] shall be sevenfold [in perfection of divine vengeance of the Almighty], as the light of seven days [when the prophecies are accomplished and has been summoned a bird of prey from a far off land to fulfill the purposes of Jehovah], in the day of Jehovah binding up the [violent] break of His people [through the forceful entry made upon them by foreign invasion], and the wound of His blow [the severe chastisement manifest in the bondage and captivity of His people He] heals.”