'Warfare' in the Bible

At that time, Jehoahaz's son Jehoash recaptured from Hazael's son Ben-hadad the cities that Hazael had captured through warfare from the control of Jehoahaz, Jehoash's father. Joash defeated and recovered cities of Israel from Ben-hadad three times.

""Why are you so confident? You're saying but they're only empty words "I have enough advice and resources to conduct warfare!'