Here's a fun fact...
About a hundred years ago, a czech composer by the name of Julius Fucik made a song called "Entry of the Gladiators", intended for use in marching, which is still extremely popular today. And that song is by far the most popular song he ever wrote also.
But if he were alive today, he would probably kill himself.
Find out why, by listening to it:
//youtu.be/_B0CyOAO8y0