Bardock is Goku's father in the Dragon Ball Franchise. His son is sent to destroy Earth. He wants revenge on Freiza for killing his men. Freiza destroys him and planet Vegeta.
Bardock is Goku and Raditz father and a lower class Saiyan warrior. Much of his life is unknown, but he is shown to have lead his own squad into various battles and they are very successful in completing various assignments. Bardock was a member of the Saiyan Army which was under the command of Frieza's organisation until he realized that Frieza was intending to destroy the Saiyan race.
Bardock takes over planets with his team to take control of the galaxy. After he destroys a particular planet, one of it's inhabitants gives him a vision into the future. He stays back after destroying the planet and his team goes on. Frieza warriors appear and attack his men as they thought that Bardock was getting to powerful and might try to stage a coup. Bardock goes after his team and finds them all dead. Then Frieza warriors fight him but he defeats them and then Dadoria appears and defeats him.
Barely alive, Bardock goes to a planet called Vegeta. He heals himself and attempts to enlist men against Frieza. No one would join his cause so he goes after Frieza alone. He makes his way to Frieza by killing the troops in the way. He confronts Frieza and with his last bit of power he uses a spirit cannon towards Frieza.
Frieza counters Bardock's attack and it overpowers him. The blast destroys him and the planet Vegeta behind him. Before he passes away he sees the future of Goku defeating Frieza.