Did you know that the book of Revelation teaches definitively, that the great tribulation was fulfilled in the first century? The 144,000 were first-fruit (first century) Jewish Christians (Revelation 14:1-4). But, the 144,000 came out of the great tribulation (Revelation 7:2-14). Therefore, since the first-fruit (first century) Jewish Christians went through the great tribulation, the great tribulation must have occurred in the first century. These facts agree perfectly with the words of Jesus when he said that the great tribulation would be fulfilled in the lifetime of his first century disciples (Mathew 24:14,34). On a side-note, Revelation 7 and 14 also place the sealing and the salvation of the 144,000 in the first century generation. This is a powerful video!
The Institute Of Fulfilled Eschatology