Rev 13:1-4
John saw a beast (beast is often referred to as nations in scripture) rise up out of the sea having seven heads and ten horns and upon his horns ten crowns, (crowns denotes Kings) and upon his heads the name of blasphemy.
The beast rises up out of the sea as the sea here is symbolic of people and nations as in a sea of humanity, Daniel Chapter 7:1-8; Revelation 17:15. This beast is the Luciferians political, economic and false religious system (revived Roman Empire) who gives its power and authority to the beast out of the earth who is the false prophet (son of perdition) who will cause a great falling away, but will be consumed by the spirit of the mouth of Christ when He returns, 2 Thessalonians 2:1-12; Rev 19:11-21. USA especially Washington DC was founded on this system and have always followed after the beast out of the sea. USA is a Christian nation and will come under great persecution from the two beast. (stand in the Holy place and be not tempted)
The seven heads are that of the Babylonian Empire, Medo/Persian Empire and Grecian Empire and Roman Empire. The ten horns represent the nations the Roman Empire scattered to when the deadly wound was put upon them, Daniel 7:23-25. The deadly wound came in 1798 when General Berthier of France captured Pope Pius VI, who soon died in captivity in Valence, on August 29, 1799. The deadly wound was healed in 1929 by Mousilini.
Seven of these nations are the ancestors of the modern nations of Europe.
These ten nations were the Anglo-Saxons (English), the Franks (French), Suevi (Portuguese), Visigoths (Spanish), Burgundians (Swiss), Alemanni (Germans), Lombards (Italians), Ostrogoths, Heruli, and the Vandals in northern Africa. The last three being Ostrogoths, Heruli, and the Vandals had already been destroyed by the Roman Empire before their deadly wound came in 1798.