John Gill Commentary 1 Kings 20:19

"So these went out of the city, the young men of the princes of the provinces, and the army which followed them." — 1 Kings 20:19 (ASV)

So these young men of the princes of the provinces came out of
the city
First, as before observed, and marched forwards towards the Syrian camp:

and the army which followed them ;
consisting of 7000 men.