There are seven angels with seven trumpets in the Book of Revelation. When each of the seven angels sounds his trumpet, a major prophetic fulfillment is unleashed upon the human race. These events include World War I, World War II, the bombing of Hiroshima, the Chernobyl nuclear disaster, and the 1991 Gulf War. The trumpets yet to sound foretell the coming of the World War III, which will kill one-third of mankind, and the famous Battle of Armageddon. This lesson gives proof that five of the seven trumpets have already happened and the sixth trumpet could happen at any time.