Music have always followed soldiers on the battlefield. In the older days for signals and orders. Concurrently with that to boost own troops morale, or lower the enemies.
Aside from a more curious use of them, like when the US tried to annoy Manuel Noriega to leave the Vaticans embassy in Panama by way of Rock music, then I havent heard any official use of it in recent history.
So...
2 questions:
1) Have anyone heard of use of music in a modern (Post WW2) war or combat situation, official or unofficial ?
2) What would be the tune to play before going into combat ?
As an example, then I knew someone who used to play this before going on patrol:
But what tune could motivate or focus the troops?
(The fictional attack from Apocalypse now with Wagners ride of the Valkyries excluded)