'Mighty' in the Bible

Your wives, your children, and your cattle shall [be allowed to] stay in the land which Moses gave you on this [eastern] side of the Jordan, but you shall go across [the river] before your brothers (the other tribes) armed for battle, all your brave warriors, and you shall help them [conquer and take possession of their land],

so that all the peoples of the earth may know [without any doubt] and acknowledge that the hand of the Lord is mighty and extraordinarily powerful, so that you will fear the Lord your God [and obey and worship Him with profound awe and reverence] forever.”

The Lord said to Joshua, “See, I have given Jericho into your hand, with its king and the mighty warriors.

So Joshua set out with all the people of war to go up against Ai; then Joshua chose thirty thousand valiant men, and sent them out at night.

he [and his people] feared greatly, because Gibeon was a great city, like one of the royal cities, and because it was greater than Ai, and all its men were mighty.

So Joshua went up from Gilgal, he and all the people of war with him, and all the men of valor.

“The Mighty One, God, the Lord, the Mighty One, God, the Lord! He knows, and may Israel itself know. If it was in rebellion, or if in an unfaithful act against the Lord, do not save us this day!