Follow the clues in the Old Testament. Look for the word ‘number’ in Daniel and you will find it refers to years. Look for what happened in the year 666 and you will find the second dynasty of Islam was about to attack Constantinople, the capital of a Christian empire that would last one thousand years. Sounds like Revelation 15:2. Greek fire was used to defeat the attackers on the Sea of Marmara which is like a sheet of glass on a calm day. Lot of clues here. Just follow them.