Lycurgus

Their bodily exercises, too, were less rigorous during their campaigns, and in other ways their young warriors were allowed a regimen which was less curtailed and rigid, so that they were the only men in the world with whom war brought a respite in the training for war. And when at last they were drawn up in battle array and the enemy was at hand, the king sacrificed the customary she-goat, commanded all the warriors to set garlands upon their heads, and ordered the pipers to pipe the strains of the hymn to Castor;

then he himself led off in a marching paean, and it was a sight equally grand and terrifying when they marched in step with the rhythm of the flute, without any gap in their line of battle, and with no confusion in their souls, but calmly and cheerfully moving with the strains of their hymn into the deadly fight. Neither fear nor excessive fury is likely to possess men so disposed, but rather a firm purpose full of hope and courage, believing as they do that Heaven is their ally.