What is that clical-like song called played at funerals?

I think this is played at military funerals, It's usually done by piano, Ok, this might be pointless (seeing as you can't hear me..) but it goes "dum, dum, dum dum, dum, da dum, da dum, da dum" (repeat). The comma represents a short pause. It's a sad song..I honestly don't know how else to describe it haha, I hope someone knows what I'm talking about, thanks for anyone's effort.