A war is coming where the enemy (satan and his people) will overcome and kill the saints and will rule the entire world for years. There will be beasts and kings and a worshipped image, worshipping of satan, and a mark on the unsaved. It will be the worst period of Christian persecution that has ever taken place. It will end when Christ returns.
You: The book of Revelation isn't about Satan and His people.
Me: Part of it very much is about them. A large part.
Outline of Revelation:
Preamble: vision of the Son of Man...1
Historical Prologue: the 7 letters...2-3
Ethical Stipulations: the 7 seals...4-7
Sanctions: the 7 trumpets...8-14
Succession arrangements: the 7 chalices...15-22
Outline of Deuteronomy
Preamble...1:1-5
Historical Prologue...1:6-4:49
Ethical Stipulations...5:1-26:19
Sanctions: 27:1-30:20
Succession Arrangements: 31:1-34:12
You will also find the same outline in Hosea:
Preamble...1
Historical Prologue...2-3
Ethical Stipulations...4-7
Sanctions...8-9
Succession Arrangements...10-14
Deuteronomy is the beginning of the old covenant between God and Israel. Revelation is the end of that covenant, complete with the sanctions upon Israel for failure to keep the stipulations specified in the covenant.