When Christians think of the battle where Christ returns to cast the antichrist and the false prophet in the lake of fire, where Satan is bound for a thousand years, they think of the battle of Armageddon as the last great battle in the Bible (Revelation 19:17-21;20:1-3). That would be incorrect. The last great battle where Satan and his minions are cast into the lake of fire is the battle with Gog and Magog after the millennial reign of Christ (Revelation 20:7-10). The antichrist and his minions are long gone by the time Gog and Magog appear in the narrative.
The majority of Christians give little thought to final battles in the book of Revelation either because they believe the book to be allegorical, a-millennials, or that Christians will be raptured into heaven before any of this happens, pre-millennials. Yet, there is no scripture that supports either case, not even 1 Thessalonians 4:15-17. Commentaries that espouse a pre-millennial rapture ignore the scriptures where the New Testament Epistle writers believed they were living the last days where the return of Christ was imminent (2 Timothy 3:1; Hebrews 1:2; James 5:3; 2 Peter 3:3; 1 John 2:18). That means they believed the Church was already in the tribulation and had no notion of a pre-tribulation rapture.
If we accept that the Church will go into the tribulation, just as the Apostles believed, then the second and third chapters of Revelation are understood as a message of warning and encouragement to the tribulation Church. Indeed, the blessings promised to those who overcome in those two chapters are seen being given to the overcomers in the following chapters.
The battle of Armageddon is not the final battle with Satan and the idyllic world where the lion lies down with the lamb does not occur until after the battle with Gog and Magog (Isaiah 11). It is interesting to note that Isaiah 11:11 tells that this idyllic world happens when God gathers His people from the nations of the earth a second time, perhaps after the second and final battle with Satan.
The news gives evidence daily that the prophesies of Daniel conare being fulfilled. The tribulation is approaching and there will be no taking away of the Church, the one true light in the world. We are given the light of Christ to proclaim it, not to hide it (Matthew 5:14-16).
May God bless you in your study of His word.