Here's something else in the Bible, Armageddon will only occur once the entire world knows the Word of God. Ironically there are still places in the Middle East where the citizenry are so oppressed that they literally haven't even seen a Bible.
Yes, every nation will hear the gospel. Not every individual will accept it. "And this gospel of the kingdom will be preached in the whole world as a testimony to all nations, and then the end will come." -Matthew 24:14. Unfortunately, too many Christians today believe in a pretribulation rapture and think the end is when they get raptured up leaving everyone else to spend 7 years in hell on earth. It's a doctrine of complacency. If I have fire insurance and a ticket to paradise before the SHTF, why do I have to do anything else? That's not what the Bible says.
Revelation 6:9-11 has the Christians beheaded starting at the 5th seal. Revelation 7:9-17 confirms this and verse 9 hints it will occur around Palm Sunday (they're holding palm branches). That's about 2 years in. Daniel 7:25 has the saints handed over to the antichrist starting at this time for 3.5 years. That's up to 5.5 years in. During this 3.5 year persecution of the saints, God sends his two witnesses during which time Israel is trampled on by the gentiles until the time of the gentiles is completed. Luke 21:24, Revelation 11:1-14, Revelation 11:13 hints that the earthquake and the time the two witnesses ascend into heaven will be the day of atonement, the 10th day of the seventh month, 1/10 of the city destroyed, seven thousand killed. The day of atonement to the Jews is the last day to get right with God. After this which would coincide with 7 months after burying the bodies from the Russian invasion of Trumpet 6 (Ezekiel 39:12-13), Israel will be brought out of captivity (Ezekiel 39:25), and the Holy Spirit will pour out on all of Israel, much like it did on the day of Pentecost after Jesus' ascension (Ezekiel 39:29, Joel 2:28-32) That will leave all of Israel to evangelize the world during the last year of the tribulation. Also, after the Christians start getting persecuted at seal 5, God seals 144,000 Jewish men to preach the gospel (Revelation 7:1-8).
Just before the bowl judgments, the last year, if the Jews followed God's instructions, they will have harvested enough food to get them through the entire year (Revelation 14:14-16). Year seven will be a sabbath year for growing crops (you let the land rest). This goes back to Daniel's seventy sevens and what was done in them (Daniel 9:24-27). You had the feast of first fruits (Leviticus 23:9) counting down to the feast of weeks or Pentecost where they started with a sheave/Omer as an offering. Note in the King James Version (older more accurate versions), for the third seal, it says an Omer of wheat for a denarius. The feast of first fruits was in the spring after the first year when they received the grain harvest. This gives the timing of the seals. A year from first to third puts them at 180 days apart. The first Trumpet gives the timing of those judgments, though this can be assumed with 3.5 years before and a year at the end putting them at 2.5 years total (3.5+2.5+1=7). This also confirms what Jesus said about these being the beginning of birth pains (Matthew 24:8). Birth contractions increase in both frequency and intensity. The judgements get closer together in time as they get worse and deadlier. The start date comes from the destruction of the fruit and grain. "Grain offerings and drink offerings are cut off from the house of the Lord."-Joel 1:9. While grain or grasses grow in a year, it takes at least two to three years for trees to yield fruit. Fruit is sacrificed during the fall feasts in the third year (2.5 years) (Amos 4:4). While the world is dying to find food, God's people should be okay. The last year are the bowl judgments and they mirror the plagues of Moses in Egypt and Elijah. They are the two witnesses that are killed (Malachi 4:4-6). That passage says of Elijah, "He will turn the hearts of the fathers to their children, and the hearts of the children to their fathers; or I will come and strike the land with a curse." Well, after killing Moses and Elijah, the Bowl judgments mirroring historic plagues they were known for bringing is a decent curse and even the plagues will point the unbelieving to the existence of God whether they are allowed to be told the good news from a Christian or not.
So after having the Christians evangelize until they are killed, then the 144,000, then the two witnesses, then all of Israel, not to mention dozens of signs in the sky, natural disasters of unheard of scale, having the most widespread ability to find knowledge in human history at your fingertips, and the Bible being the most copied book in all of history, nobody will have an excuse for saying no to God on the day of judgment.
