The seven trumpets are the second sequence of visions which Jesus gave in the Revelation. The trumpets represent the prophetic feast of trumpets which God gave to mark the appointed times of His plan for mankind. The trumpets most likely commence at the beginning the Great Tribulation.
The first four trumpets signal devastation to the earth and the sea which we see beginning when Satan is thrown down to earth by Michael in Revelation 12:7-12.
Let’s review the sounding of the seven trumpets with the backdrop of Daniel’s 70th Week.