During the Vietnam war, the Trump found a doctor who would declare him unfit for military service, but quite heroically fought his own, personal "Vietnam war". 

In the Trump's own words:

"I've been so lucky in terms of that whole world (of sexually transmitted diseases). It is a dangerous world out there. It’s scary, like Vietnam. Sort of like the Vietnam-era. It is my personal Vietnam. I feel like a great and very brave soldier.”

The Howard Stern Show, 1997