WOFT  

you need to do your homework.  Our class had the highest fatality rate of any Army one, ever - yes, ever.

As to the 10% figure the actual mortality rate of all helicopter pilots in Vietnam was less by half your stated value.  The infantry mortality was 7% though the wound rate almost 50%.  

Spit on?  No.  On return only thing I noticed was American indifference and others scared to do what their country might ask of them.  Pretty much just like now though think both qualities are worse.

The real kicker was quite a few veterans (officers) I worked with were dismissing their military endeavor as something they did not lay claim to.  Found that dishonest and less than honorable.

Serving, surviving and being honest with oneself and others is useful!