# Dragon Ball Z, Vol. 12
## Part I: The Saiyan Threat
- Arrival of the Saiyans
- Raditz's arrival on Earth
- Goku's confrontation with Raditz
- Gohan's first encounter with his uncle Raditz
- Formation of the Z Fighters
- Piccolo and Goku's temporary alliance
- Training Gohan to fight
- Preparation for the Saiyan invasion
- Battle with Raditz
- Goku sacrifices himself to defeat Raditz
- Raditz's death and Goku's journey to the afterlife
- Revelation of Vegeta and Nappa's impending arrival
## Part II: Preparing for the Saiyan Invasion
- Training in the Afterlife
- Goku's journey along Snake Way
- Meeting King Kai
- Intense training under King Kai's guidance
- Earth's Warriors Train
- Piccolo trains Gohan in the wilderness
- Yamcha, Tien, Chiaotzu, and Krillin's training with Kami
- Bulma and the Dragon Radar's role in preparation
- Arrival of Vegeta and Nappa
- Destruction of East City
- The Z Fighters' strategy to face the Saiyans
- Vegeta's arrogance and Nappa's brutality
## Part III: The Battle Against Nappa
- Initial Confrontation
- Nappa vs. Piccolo, Gohan, and the Z Fighters
- Yamcha's sacrifice
- Tien and Chiaotzu's desperate attempts to stop Nappa
- Turning Points
- Piccolo's critical role in the battle
- Gohan's hidden power unleashed
- Krillin's last-ditch effort to save the team
- Vegeta's Intervention
- Vegeta's disdain for Nappa's failures
- Nappa's demise at the hands of Vegeta
- Vegeta's challenge to the remaining Z Fighters
## Part IV: The Aftermath
- Goku's Return
- Goku arrives just in time to face Vegeta
- Goku's new strength from training with King Kai
- The epic battle between Goku and Vegeta begins
- The Power of Friendship
- Gohan and Krillin's support for Goku
- Teamwork as a key to overcoming impossible odds
- The use of the Spirit Bomb against Vegeta
- Vegeta's Escape
- Vegeta's near-defeat and retreat
- The Z Fighters' victory and recovery
- Foreshadowing of future threats