Why does Samuel say it was the threat of Nahash that made the Israelites ask for a king in 1Samuel 12:12?

Question

1 Samuel 12:12-13 NASB

[12]When you saw that Nahash the king of the sons of Ammon came against you, you said to me, 'No, but a king shall reign over us,' although the Lord your God was your king. [13]Now therefore, here is the king whom you have chosen, whom you have asked for, and behold, the Lord has set a king over you.

The children of Israel had already asked for a king well before the threat of Nahash

1 Samuel 8:4-5 NASB

[4]Then all the elders of Israel gathered together and came to Samuel at Ramah; [5]and they said to him, "Behold, you have grown old, and your sons do not walk in your ways. Now appoint a king for us to judge us like all the nations."

Samuel had already anointed & proclaimed him king at Mizpah before there was any threat from the ammonites

1 Samuel 10:17,24 NASB

[17]Thereafter Samuel called the people together to the Lord at Mizpah; [24]Samuel said to all the people, "Do you see him whom the Lord has chosen? Surely there is no one like him among all the people." So all the people shouted and said, "Long live the king!"

So why does Samuel say that it was the threat of Nahash that galvanised them to seek a king?

Answer 1

E.W. Bullinger, Figures of Speech Used in the Bible, called this "Hysteresis; or, Subsequent Narration".

https://archive.org/stream/cu31924029277047#page/n759

[No need to download the PDF on archive.org. If using the 'preview window', click on magnifier ("search inside"), then go to pdf page 760 (book page 705).]

Hysteresis, Gr. "to come after/later".

This is a special form of Hysterologia, and does not refer to connected records or events, but gives, long afterwards, further details of some long prior events; or, gives events never before recorded.

When a record, written much later, gives supplemental or new particulars, quite disconnected from the original historical record, it is called Hysteresis; and hence has been called Historical Hysteresis....