As an EX Royal Marine-I know I have an affinity with some of you in the US from the USMC. We did the same job- Except for me as I was in the Boxing team and didn't do much at all.
But one thing I used to get involved in was The Royal Marine Band. Being a "Musician" in Inverted comma's and said tongue in cheek--as I played bass guitar and every depot I was posted to had a "Pop" Group of some kind that utilised my musical talents. Considering as how the others were Trained musicians- I could never understand how they put up with an amateur like me.
BUT one thing I used to enjoy was listening to what can only be termed the Greatest Military Band in the world. With these long evenings and no riding- I have started perusing the internet and some of that has been the RM Band. They have a sound of their own and much of it comes from the Drummers. They have made an art form of their skill and I could listen to them for hours.
Just to give you a taste of what my new computer has found on the internet.
I no longer live in my service days but you always have a fondness for the Old regiment you served in. But all I have to hear is the sound of those drummers and I am lost in the many happy days I spent 40 years ago.