I don't think I would have written a combat novel if I had just had peacetime military training. I think, in fact, I probably would have remained a poet and just written a short story every now and then.
No good deed goes unpunished. I missed the moon landing by being nice to a stranger.
There's something special about writing by hand, writing with a fountain pen, and there's something special about writing into a book, to take a blank book and turn it into an actual book.
No person can escape Einsteinian relativity, and no soldier or veteran can escape the trauma of war's dislocation.
I think I would have been a writer, anyhow, in the sense of having written a story every now and then, or continued writing poetry. But it was the war experience and the two novels I wrote about Vietnam that really got me started as a professional writer.