During world war i, how did airplane pilots become fighters?
1.they trained with ground forces.
2. they began to use penicillin.
3.they installed flamethrowers on their planes.
4. they attached the repeating guns on their planes.

The correct answer is number 4) they attached the repeating guns on their planes.

During World War 1, the airplane pilots became fighters by attaching the repeating guns on their planes.

Pilots of airplanes began to fight in the air at the end of World War 1. Although it may sound incredible, the pilots first attempted to shoot each other with rifles or throwing grenades. It did not result so well. So what they did was to attach the repeating guns on their planes. They started to mount machine guns on the planes. That is how they started combat in the air. The fight between planes was called “dogfights”.