Rev 20:1 And I saw an angel come down from heaven, having the key of the bottomless pit and a great chain in his hand.
Rev 20:2 And he laid hold on the dragon, that old serpent, which is the Devil, and Satan, and bound him a thousand years,
Rev 20:3 And cast him into the bottomless pit, and shut him up, and set a seal upon him, that he should deceive the nations no more, till the thousand years should be fulfilled: and after that he must be loosed a little season.
Rev 20:2 And he laid hold on the dragon, that old serpent, which is the Devil, and Satan, and bound him a thousand years,
Rev 20:3 And cast him into the bottomless pit, and shut him up, and set a seal upon him, that he should deceive the nations no more, till the thousand years should be fulfilled: and after that he must be loosed a little season.
After that of the beast, false prophet and all those political leaders from every nation have been revealed and destroyed by the brightness of Christ coming, 2 Thessalonians 2:8, Satan is bound for a thousand years as he can no longer deceive the nations anymore and after the thousand years are fulfilled he will be set loose for a small amount of time.
There are various teachings about the thousand years, but I do not see the thousand years being literal after Satan is bound even though a thousand is written. I believe it is symbolic or figurative number like that of Deuteronomy 7:9; 1Chronicles 16:15; Psalms 50:10; 90:3-5; 105:8 Ecc 6:6; 7:28; Daniel 5:1; 2Peter 3:8. Satan will be held back for a time while Jesus plants His feet on the Mount of Olives. What else is to take place within a literal thousand years that will need to be fulfilled as the only thing left is for Satan to be loosed for a time as he gathers all nations for the final battle against the saints, but his army will be consumed by fire that God sends down from heaven and then Satan cast into the lake of fire. Why would God wait a thousand years for His final judgment? What else could possibly take place during a thousand years before God ushers down the New Jerusalem?