I believe that the last part of Ezekiel 39 is Armageddon:
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Ezekiel 39:17-20 "And as for you, son of man, thus says the Lord GOD, 'Speak to every sort of bird and to every beast of the field: "Assemble yourselves and come; Gather together from all sides to My sacrificial meal Which I am sacrificing for you, A great sacrificial meal on the mountains of Israel, That you may eat flesh and drink blood. You shall eat the flesh of the might, Drink the blood of the princes of the earth, Of rams and lambs, Of goats and bulls, All of them fatlings of Bashan. You shall eat fat till you are full, And drink blood till you are drunk, At My sacrificial meal Which I am sacrificing for you. You shall be filled at My table With horses and riders, With mighty men And with all the men of war," says the Lord GOD.
There appears to be a shift of events here. Before verse 17, Ezekiel was focused on a regional war with Gog and his armies. Right after this, the scriptures describe the 7 month cleanup and burial. But then we are told in this passage, that the birds are invited to feast on "all men of war". At the end of the Tribulation in Revelation 19: 17-21, we find the parallel passage to this fowl's feast. Earlier, Ezekiel 39:4 shows that specifically the Gog and Magog armies will be fed on by birds, but the Scriptures here in verses 17-20 clearly say "all men of war", not just Gog's men of war.
We see in the next passage, verses 21-29, that after this feasting, God will bring the Jews back to Israel. This will not be fully realized until after the Tribulation is over. In fact, the Jews are commanded to run to the mountains and hide during the Tribulation (Matthew 24:15-20). Later, the Jews are gathered at the end of the Tribulation (Matthew 24:31).
In short, all of Ezekiel 38 thru Ezekiel 39:16 appears to cover one regional event, and Ezekiel 39:17 thru the end of the chapter, appears to cover a different event that is on a worldwide scale. As a note, it is not uncommon for separate events in prophetic passages to be written as though they are just one event. There are numerous passages of Christ First and Second Comings in the Old Testament that demonstrate this (See The Pre-Tribulation Rapture study). In this case, Ezekiel 38 and 39 would depict the opening and closing scenes of the Tribulation.
Click here for the rest of the study on Ezekiel 38-39:
Luke 21:28 "Now when these things begin to happen, look up and lift up your heads, because your redemption draws near.”