According to some premillennial Christian interpretations, the Messiah will return to earth and defeat the Antichrist (the "beast") Satan/Lucifer/ Devil in the battle of Armageddon. Then Satan will be put into the "bottomless pit" or abyss for 1,000 years, known as the Millennial Age. After being released from the abyss, Satan will gather Gog and Magog (peoples of two specific nations) from the four corners of the earth. They will encamp surrounding the "holy ones" and the "beloved city" (this refers to Jerusalem). Fire will come down from God, out of heaven and devour Gog and Magog after the Millennium, and the Devil, who deceived them, death hell and whosoever was not found written in the book of life are thrown into Gehenna (the Lake of Fire burning with brimstone)
These paintings depict some of the cast of characters in this upcoming drama.