In the last portion of Revelation 12, we see two major events happening. First, there is war in heaven resulting in the ouster of Satan and his fallen angels. Second, Satan becomes exceedingly wrathful because he knows his time is short so he attempts to get to the "woman," but she is protected by God. Satan then turns his attention to the rest of the believers during this second half of the Tribulation, what Jesus called "great tribulation" in Matthew 24.
Dr. Fred has written numerous books and articles that cover a wide-range of theological topics and he endeavors to present the study of God's Word in a clear fashion, helping the average layperson comprehend the great truths of Scripture.