Nah.
I met several men when I was growing up who fought in the first world war.
After finishing their time in the military they learned a useful trade and were just starting to raise families when the Depression hit. When the second war hit these guys had skills needed (machinists and boiler technicians) by the navy. They served again in the second world war, often with their own sons serving elsewhere.
There were three of these men in the small north Kansas farming town where my grandfather lived. My grandfather always pointed them out and talked to them when we went to town.
Those men were the greatest generation.
And,of course,there were more than a few guys who fought bravely and skillfully in Vietnam but as *I* know (having lived through that era) there were many,many cowards and traitors at that time as well (Bill Clinton and Jane Fonda,for example).
Around 1990 I met a man in his mid 80’s who told a similar story about his father occasionally taking him to the ~old soldiers home~ for confederate vets.