Samuel said to the people, It is Yahweh who appointed Moses and Aaron, and that brought your fathers up out of the land of Egypt.
But, again from Willis: "That does not explain how such an idea ever emerged.  The Ammonites and the Philistine were allies against Israel  (Judges 10:7,11); and there is no reason why they might not have asked for a king because of dangers they were facing from both the Philistines and the Ammonites."[11]  Additionally, the obvious solution to the alleged difficulty lies in the fact cited by R. P. Smith, "It is probable that there had been threats of war, and even incursions from the Ammonites against Israel by Nahash before his attack on Jabesh-gilead."[12]