AP World History Study Guides UNIT 1 - Chapter 13 and Chapter 14 UNIT 2 - Chapter 15 and Chapter 16 UNIT 3 - Chapter 17 UNIT 4 - Chapter 18 UNIT 5 - Chapter 19 and Chapter 20 UNIT 6 - Chapter 21 UNIT 7 - Chapter 22 UNIT 8 - Chapter 23 and Chapter 24