Answer:
Alluding to this story when describing a battle probably implies that courage is more powerful than military power.
Explanation:
In case you didn't know, the story of David and Goliath tells how the little boy, without physical strength and without any military power, not even with an armor that wore him, managed to defeat a powerful giant, with great strength, military power, weapons and strong armor.
Even in the face of such a challenge, David used all his courage and decided to defend his people from the clutches of this giant, so he used the best weapon he had (a stone and a slingshot), was not afraid and won the battle that seemed impossible to be unsuccessful.
This story can be used as a narrative to describe a battle that seems impossible, but that can be won with courage and daring that are the most powerful weapons that anyone can have.
