From Ancient Terra the Emperor commands His Proud Sons.

From Ancient Terra the Emperor commands His Proud Sons.
From revered Blood-stock these Warriors are made His Proud sons.
No fear they know Adeptus Astartes, His Proud Sons.
Humanity's foes they lay dead at the hands of His Proud Sons
Warrior's merit Unbreakable spirit, Astartes!
To many enemies, Unchallenged in Battle Astartes!
Warrior's merit Unbreakable spirit, Astartes!
Courage and honor, Unbroken in Battle, Astartes!