What do you call veterans who won't stay down no matter how hard they're knocked down?

What do you call #Veterans who won't stay down no matter how hard they're knocked down?

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Blogging: Commentary on the art and science of maintaining a successful website/weblog
Cuba: History of the island and its people gathered while writing my novel, Hatuey's Ghost
Good Reads: Book reviews and interviews with current authors
Infantry School: A journal of my experiences in Basic Combat Training, Advanced Infantry Training, and Infantry Officer Candidate School in preparation to going to war in Vietnam.
Oh-dark-thirty: Random thoughts that wake me up in the middle of the night
Opinion: I am not a member of any organized (or disorganized) political party. My views tend to be libertarian.
Sea Scouts: A journal of my experiences as man and boy with this branch of Boy Scouting (probably not what you'd expect)
Today's Chuckle: Comics and jokes "borrowed" from other sources with links and thanks to the owners of the originals

Vietnam: A journal of my experiences and observations of the Vietnam War while assigned to the 9th Infantry Division, 1967 to 1968
Writing: Personal observations on the craft of writing and the current condition of the publishing industry