'Expert in War' in the Bible

Moreover, Hushai said, “You know your father and his men, that they are mighty men and they are fierce, like a bear robbed of her cubs in the field. And your father is an expert in warfare, and will not spend the night with the people.

“All of them are wielders of the sword,Expert in war;Each man has his sword at his side,Guarding against the terrors of the night.