What are the Z Warriors?
The Z warriors are a elite class of fighters that gather to defend the earth from enemies, unlike the Earth's special forces this group of fighters is much stronger, and have the potential to overcome any enemy, they gathered at around the end of the frieza saga to the end of dragonball Z. They weren't used in the garlic jr saga, and they really surfaced as a group in the cell saga when they were fighting the androids, as well as when they were in the cell games.

Who is in this group?
- Goku
- Vegeta
- Trunks
- Piccolo
- Gohan
- Goten
- Ubuu
- Future Trunks

What else?
Unlike the Earth's special forces this group of fighters is superior to the others because they have the ability to train harder, and gain more strength each time they train, as you can see none of these fighters are fully human, not saying that humans are weak, but they are in fact much stronger then some of the other fighters that are a part of the Earth's special forces, people like Goku, Gohan and Piccolo were able to train hard, and become Z fighters making them upgrade from earth's special forces to Z Fighters, this is mainly because they either fused of turned super saiyan.