One of the reasons I love Twitter is that it directs me to things I would never otherwise have seen in my entire life. I had never heard, until five minutes ago, of Reckless, who, as @AlexBrownRacing points out on his feed, is a real war horse. She was a small, brave filly, used by the Americans in the Korean War, and the marines loved her so much that they promoted her to Sergeant, gave her a special embroidered rug with her new title, and held a parade. A PARADE. It's too much.
Here is the rather stilted but incredibly touching video about her, to which dear old Twitter directed me: