'Mighty men' in the Bible

Your wives, your little ones, and your cattle, shall remain in the land which Moses hath given you over the Jordan, - but, ye, shall pass over, armed, before your brethren, - all ye mighty men of valour, and shall help them;

Then said Yahweh unto Joshua, See, I have delivered, into thy hand, Jericho and her king, - the mighty men of valour.

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

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