Who said "A shield wall is only as strong as the man beside you."?

This quote is attributed to Leonidas I.

A shield wall is only as strong as the man beside you. - Leonidas I

"A shield wall is only as strong as the man beside you."

Leonidas I Friendship

King Warrior Ancient Greece 540–480

"This is Sparta!"

"Spartans! Tonight we dine in hell!"

"A man's true measure is taken not in a moment of comfort and convenience, but in a moment of challenge and adversity."

"Freedom isn't free, it requires sacrifice and courage."

"Friendship is built on trust and honesty."

"True friendship is worth more than gold."

"Good friends are like stars, always there even when you can't see them."

"Friendship means sacrifice."