Afterwards, the team parts ways for another five years; during which time, Goku and Chi-Chi marry and give birth to their first son Gohan.
The first actual formation of the "Z Fighters" is out of necessity; brought on when Goku is faced with his long lost older brother Raditz, who had come to Earth to find Goku and tells Goku the truth about his Saiyan heritage.
Afterwards, the entire team (sans Oolong and Launch) gathered at Fortuneteller Baba's Palace in order to do battle with her warriors as a price for her telling them where the final Dragon Ball is, for Upa.
Due to them just being a group of martial artists who group up from time to time, they have no official leader or particular positions.
Goku faces the last of King Piccolo's sons, Piccolo Junior, in the final round of the tournament.
Despite Piccolo's attempts to kill him, Goku ultimately defeats Piccolo and decides to spare his life after sensing that Piccolo can be redeemed.
After Goku's death against Raditz, Piccolo trains Gohan to prepare for the arrival of the Saiyan warriors Vegeta and Nappa a year later, while Goku trains under King Kai in the Other World before being revived by the Dragon Balls.
Though several of the members expressed distrust of their former enemy Piccolo, this first Z Fighter roster consisted of Goku, his inexperienced son Gohan, Piccolo, Tien Shinhan, Krillin, Yamcha and Chiaotzu.