Battle in the Red Zone!! (レッドゾーンの闘い！, Reddo Zōn no Tatakai!; lit. "A Fight in the Red Zone!") is the two hundred thirty-first chapter of the Dragon Ball manga. The chapter's anime counterpart is the first half of the episode "Saiyan Sized Secret".
The cover of this chapter shows an injured Goku.
Vegeta is shown to be angered at the fact that Goku's power has surpassed his own. Having enough of it, Vegeta decides to destroy Earth with his Galick Gun attack. However, Goku manages to counter the blast with a Kaio-ken Kamehameha and overpowers Vegeta, seemingly defeating the Saiyan prince.
|Volume 20: Goku vs. Vegeta|
|The Decisive Battle at Last! · Too Much Power? · Battle in the Red Zone!! · The Moon · The Energy Sphere · All That Power... · The Last Heartbeat · Least Resistance · One More... the Sphere! · The Hopes of a Planet · The Worn-Out Warriors · Monkey in the Moon|