A man - See Genesis 12:7, note; Genesis 18:2, note. The appearance was that of God manifested in the Person of His Word. Hence, the command of Joshua 5:15. That the appearance was not in a vision merely is clear from the fact that Joshua “went unto Him” and addressed Him.
Related Commentaries of Joshua 5:13
Joshua 5:13
13 And it came to pass, when Joshua was by Jericho, that he lifted up his eyes and looked, and, behold, there stood a man over against him with his sword drawn in his hand: and Joshua went unto him, and said unto him, Art thou for us, or for our adversaries?