1st Thessalonians 4:16 says that those Christians who have already died when Christ returns, will rise first
For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first:
In the Revelation 20:4 and 5 it tells us that that will not take place until after the thousand year reign, if I understand it correctly;
Verse 4 as I read it says that those who were martyred for Christ will resurrect and reign with him, but the rest of us will not resurrect until after the thousand years.
Or am I misreading 1st Thessalonians, and it is referring to only the martyrs?
20:4 And I saw thrones, and they sat upon them, and judgment was given unto them: and I saw the souls of them that were beheaded for the witness of Jesus, and for the word of God, and which had not worshipped the beast, neither his image, neither had received his mark upon their foreheads, or in their hands; and they lived and reigned with Christ a thousand years.
20:5 But the rest of the dead lived not again until the thousand years were finished. This is the first resurrection.
20:6 Blessed and holy is he that hath part in the first resurrection: on such the second death hath no power, but they shall be priests of God and of Christ, and shall reign with him a thousand years.