During the db/z/gt serieses many of the warriors died. Both good and bad warriors were being slaugtered left and right. Here is a list of who dies and at what time period it happened in.

Gokou

1. October 12, 761 : Piccolo kills him and Raditz
2. Dies of a heart disease (In future).
3. May 26, 767 : After Cell was teleported.

Gohan

1. Killed by the androids (In future).
2. May 8, 774 : Majin Buu destroyed earth.

Vegeta

1. December 24, 762- against Freiza.
2. May 8, 774- kills himself to kill Majin Buu.

Piccolo

1. November 3, 762 : killed by Nappa to save Gohan.
2. May 8, 774 : killed when Majin Buu destroyed the earth.

Krillin

1. May 9, 753 : killed by Tambourine during a tournament.
2. December 24, 762 : killed by Freiza .
3. May 8, 774 : killed when Majin Buu destroyed the earth.

Trunks

1. May 26, 767 : Killed by Cell.
2. May 8, 774 : killed when Majin Buu destroyed the earth.

Goten

1. May 8, 774 : killed when Majin Buu destroyed the earth.

Yamcha

1. November 3, 762 : killed by a Saibaiman.
2. May 8, 774 : eaten by Majin Buu.

Chaotzu

1. May 9, 753 : Against Piccolo Daimao.
2. November 3, 762 : self-destructed on Nappa.
3. May 8, 774 : killed when Majin Buu destroyed the earth.

Tien

1. November 3, 762 : killed while fighting Nappa.
Radditz

1. October 12, 761 : killed by Piccolo while Gokou held him.

Ginyu Force

1. December 24, 762 : (Jeice) Killed by Vegeta.
2. December 24, 762 : (Burter) Killed by Vegeta.
3. December 24, 762 : (Guldo) Killed by Vegeta.
4. December 24, 762 : (Recoome) Killed by Vegeta.

Freiza

1. Kill by Gokou.
2. August 764 : killed by Trunks.
3. Killed by Gohan.

Cell

1. May 26, 767 : killed by Gohan.

Babidi

1. May 7, 774- killed by Majin Buu.

Nappa

1. Killed by Vegeta.

Andriod 17

1. Killed by Trunks(in future).
2. Killed by Majin Buu.

Andriod 18

1. Killed by Trunks(in future).
2. Killed by Majin Buu.

Andriod 16

1. Killed by Cell.

Andriod 19

1. Killed by Vegeta

Andriod 20

1. Killed by Andriods.
2. Killed by Andriods (in future).