Attack of the Dead Men
During the September Revolution in 1915, when the Bulgarian Communists tried to set up a communist republic, they weren't above using poison gas against their opponents. Throughout Bulgaria, Royalists took up arms in the name of King Boris III to defeat the Reds temporarily allying themselves with their old Ottoman foe. One such Royalist stronghold was Opaka, in Northcentral Bulgaria. A small fortress manned by 3,000 Royalist militia against an attack by around 10,000 Redshirts. The redshirts unleashed poison gas knowing that the Royalists didn't have any protection against gas attacks. After unleashing the gas they moved in with gas masks to what they presumed to be an easy fight. However much to the horror of many Redshirts, from the mist and gas remnants, they saw the Royalists charging out of the fortress with bayonets and rifles with scarfs over their mouth spitting out blood and parts of their internal organs. The mere sight was so terrifying that the Redshirts abandoned the attack. Ottoman, British and Greek media would later dub the Battle of Opaka the Attack of the Dead Men.
On October 2, 2010, in honor of their sacrifice and duty, King Boris IV of Bulgaria, who is particularly famous in the Balkans for also being a metal rock star, released a song in honor of the Attack of the Dead Men.
Turmoil at the front
Blagoev's forces on the hunt
There's thunder in the east
It's an attack of the deceased
They've been facing poison gas
5, 000 charge en masse
Turn the tide of the attack
And force the enemy to turn back
And that's when the dead men are marching again
Opaka then and again
Attack of the dead, hundred men
Facing the lead once again
Hundred men
Charge again
Die again
Opaka then and again
Attack of the dead, hundred men
Facing the lead once again
Hundred men
Charge again
Die again
Two combatants spar
Blagoev against the Tsar
Move-in 6 battalions large
Into a Bulgarian counter-charge
They'll be fighting for their lives
As their enemy revives
Bulgarians won't surrender, no
Striking fear into their foe
And that's when the dead men are marching again…
Disclaimer: OTL song is obviously Attack of the Dead Men by Sabaton.