The Bible prophesies a restoration of the Roman Empire just before Christ’s return and many Bible teachers think that the European Union is the fulfillment of that prophecy.
When the EU was formed this belief seemed reasonable. The founding members were Belgium, France, Italy, Luxembourg, the Netherlands,and West Germany and these countries are all in territory that was once part of the Roman Empire. But since membership has grown and it now includes nations such as Sweden, Finland, and Poland that were never part of the empire.
Chapters 38 and 39 of Ezekiel describe an invasion of Israel which is stopped by divine intervention. There is disagreement among Bible students about when this invasion will take place. Some think it is a description of the final battle at Armageddon; some think it will take place earlier, perhaps before the beginning of the tribulation. In the Left Behind series it takes place even before the rapture of the church.