'Mighty men' in the Bible

Your wives, your little ones, and your cattle, shall remain in the land which Moses gave you on this side Jordan; but ye shall pass before your brethren armed, all the mighty men of valour, and help them;

And the LORD said unto Joshua, See, I have given into thine hand Jericho, and the king thereof, and the mighty men of valour.

So Joshua arose, and all the people of war, to go up against Ai: and Joshua chose out thirty thousand mighty men of valour, and sent them away by night.

So Joshua ascended from Gilgal, he, and all the people of war with him, and all the mighty men of valour.