Here's a very interesting link pertaining to today's anniversary. It is a five-minute presentation/interview on the participation of one Bill Millin in the Normandy Invasion in 1944.
By WWII the playing of pipes in battle was prohibited (having a piper play under fire, as seen numerous times in WWI, while an undeniable inspiration for the surrounding men, was unusually dangerous for the piper). Lord Lovat knew when an exception was in order; he ordered his piper, Bill Millin, to play the troops ashore on Sword Beach. But be sure and listen to the link above--it's much better to hear the piper himself tell it!
Here is a wee bit more on the episode, along with a photograph.