Not a man, to wit, fit for war. Beth-el, being a neighbouring city, and encouraged by the former success, had sent some forces to assist them; and now, upon notice sent to them of the flight of their common enemies, or upon some other signal given, which might easily be done, having been appointed beforehand, as is usual in such cases, all their men of war join with those of Ai in the pursuit.
Related Commentaries of Joshua 8:17
Joshua 8:17
17 And there was not a man left in Ai or Bethel, that went not out after Israel: and they left the city open, and pursued after Israel.