Here's what makes it significant:
* Symbolic of unity: The "sluagh ghairm" brought together the warriors under a common cause and purpose.
* Psychological warfare: The loud and intimidating cry was intended to disrupt the enemy's composure and instill fear.
* Historical significance: The phrase itself embodies the fierce and proud spirit of the ancient Irish warriors.
It is still used today in Irish culture and literature as a symbol of bravery, defiance, and national pride.