Wow! I am amazed reading about the feats of strength the sons of Ya' akov (Jacob) displayed whenever they entered into battle or even when they attempted to intimidate Yosef (Joseph) prior to him revealing who he was to them. Prior to reading the book I thought the 12 Patriarchs were "normal" men.
Especially interesting was the yelp of Y'hudah (Judah) that would put the fear of YHWH in every opponent. I can only guess he would shout with an earth shattering shout the name of Yahweh whenever they went into battle and immediately Yahweh would assist them and put fear in their enemy's hearts. This tactic for removing fear is a valuable lesson for all of us. When fear attempts to come into our hearts, call upon the name of YAHWEH!