Which unit of the military has 90% failure rate for their training recruits ?

The Special Air Service

Explanation:

The Special Air Service is a very well-equipped, admired and elitist special forces regiment. This regiment represents the elite of the special forces and is coveted by hundreds of military personnel around the world.

The work in this regiment is very thorough, important and well structured. This allows for a very well established career plan, promoting a dynamic, challenging and rewarding job. The challenging element still begins in the selection process, which has a high level of difficulty with a failure rate of 90%.

answer:

they didn't want to get killed by the armed forces

explanation:

there was a lot of people there and some of the us armed forces had guns and they didn't want to die