Why did he say "Ra'isi"?
Refer to Melachim I, 22:17:1:1.
Why were they spread on the mountains?
'Rashi' #1: When people flee war, they go to the mountains ? "veha'Nish'arim Herah Nasu" (Bereishis 14:10).
'Rashi' #2: The war was in Ramos Gil'ad, a place of mountains and hills.
What is the meaning of "Lo Adonim la'Eleh"?
'Rashi': They are like flock without a shepherd, because their king was killed. Only you will die in the war, like it says (verse 31) "do not fight big or small, only Melech Yisrael." Even though it was decreed "v'Amcha Tachas Amo" (20:42), the drop of blood that left that Tzadik (Michah, when he told his colleague to hit him) atoned for all of Yisrael (Yerushalmi Sanhedrin 10:5).
To whom does "Yashuvu Ish l'Veiso b'Shalom" apply?
'Rashi', Rashi (Melachim I, 22:17): Every Yisrael except for Achav lived.
Radak (Melachim I, 22:17): They fought the entire day. Surely some Yisraelim died, but they were few; many of Aram died. This is "b'Shalom"!
QUESTIONS ON RASHI
Rashi writes that every Yisrael except for Achav lived. It was decreed "v'Amcha Tachas Amo" (Melachim I, 20:42)!
Refer to Melachim I, 22:17:5:1,2.
