Describing someone who has been injured

The injured
- The injured in the war transferred immediately to the hospital.
- Some ambulances evacuated the injured.

The wounded
Those who are injured in a war,explosion,battle ,etc...

- Helicopters transferred the wounded to the nearest hospital.

Casualty
Someone who is injured or killed in a war or in accident.

- The country's casualties were high in the war.
- There were heavy casualties on both sides.