War Against the Remnant.
"And the dragon was wroth with the woman, and went to make war with the remnant of her seed, which keep the commandments of God, and have the testimony of Jesus Christ" (Revelation 12:17).
At the end time, Satan will make an all out war with the Remnant. He is angry with them and wages war against them. The dragon is the devil, "That great dragon was cast out, that old serpent called the devil and Satan, which deceiveth the whole world" (Revelation 12:9). The woman symbolically represents God's people, "I have likened the daughter of Zion to a comely and delicate woman" (Jeremiah 6:2).
The word “remnant”, describes those who remain faithful to God at the end while the majority apostatize. The remnant are/will be faithful to God's original truth despite apostasy and opposition. All throughout history since creation, God has always had a remnant of people who are faithful and fully surrender to Him. It's in the Bible, "Except the Lord of hosts had left us a very small remnant, we should have been like as Sodom, and we should have been like unto Gomorrah" (Isaiah 1:9). Among people professing religious faith, the remnant is a relatively small minority. "Though the number of the children of Israel be as the sand of the sea, a remnant shall be saved" (Romans 9:27). So while the majority of people in the world side with Satan at the end of time, a group of people will remain faithful to Christ in the face of Satan’s full fury.
The end-time remnant will keep God’s commandments and “have the testimony of Jesus Christ" of course.
Satan's effort to destroy the people of God and to remove Bible principles from their lives continue even to the present time. First, he persecuted Christ through pagan Rome. Next he persecuted the church in the first centuries through pagan Rome. Then he brought the world into the church and persecuted the faithful followers of God through Papal Rome for 1260 years during the dark ages.
Finally, according to Bible prophecy, he will seek to destroy those at the end of time who by faith are obeying God. He ultimately "makes war with the remnant of her seed." "Here is the patience of the saints: Here are they that keep the commandments of God, and the faith of Jesus" (Revelation 14:12). God is calling us out from the world, a people who will throw off the last vestiges of sin and corruption and return to a pure Bible religion.