Soldiers who go to war without knowing how the enemy fights, end up as casualties. It's called the element of surprise, and Satan has that strategy down to a science. But he's basically used up his playbook, which means that if we understand his past attacks, and God's equally strategic response, there's no risk of catastrophic surprise.
The original rebellion in heaven and the life of Christ set the pattern. The inspiring and disturbing life of one man (John Harvey Kellogg) provides insight into both the beginning of the loud cry and the alpha of apostasy.
God has provided the vital intelligence we need to survive the greatest onslaught the world has ever seen.