Chapter 20 reveals the established kingdom of Christ and the reign of His Church (the NC nation of Israel) over Satan and this world (Mat 16:18) from 70 A.D. until the final war and judgement. It therefore represents the “Church (or New) Age” in contrast to the “Old Age” (Luk 1:70; Heb 9:9) or “the Age to come” (Heb 6:5; Mar 10:30).