During a campaign on a distant planet, Bardock is given orders by his partner, that every Saiyan member is ordered to withdraw to their planet by Freeza.
Raditz and Vegeta refuse to follow orders that allows them to survive the impending genocide.
Gine and Burdock decide to send Kakarotto away to Earth to come back and retrieve him at a later day.
The Departure of the Fated Child was an event that took place months before Bardock's rebellion against Freeza's Army. This event plays as a prologue to the story—where, Son Gokū is sent to Earth by his parents, because of the dubious and suspicious orders of Freeza. The proceeding of this events leads to a grand-scale rebellion that is ended with the genocide of the Saiyan race.
