If I’m not mistaken.. the Peace Treaty is for 7 years and in 3 1/2 years the antichrist breaks it and so brings the tribulation.
In my reading of all scripture on the subject there is the Tribulation and the Great tribulation.
7 yr Trib and 3.5 years of the Great Trib. The point at which the antichrist is revealed and the fullness of God’s wrath is poured out on man.