Why does it mention that it was the first month?
'Rashi': In Nisan, all the snow melted [so the Yarden overflowed its banks].
What is the meaning of "Memalei"?
Radak: It is an adjective like Malei (full).
What is the meaning of "va'Yavrichu Es Kol ha'Amakim"?
'Rashi' #1: They split the river with their shields, and caused the water to go the east and west 1 , and they went on the dry land.
'Rashi' #2: They made flee all the nations 2 dwelling in the valley.
Radak: When those dwelling in the valley saw such a big army, they thought that they are enemies, and they fled.
Malbim: There was a war with Bnei Hagar in the days of Sha'ul; they made Bnei Hagar flee.
They went from east to west. If the water would go to the north and south, this would enable them to go on the dry land. How did it help that the water went to the east and west? (PF)
What nations were there? Yisrael live west of the Yarden! Even though each Shevet is called an Am (Rashi Devarim 33:3), if 'Rashi' refers to the Shevatim, he should say Shevatim! Perhaps he holds like Malbim (refer to 12:16:3:4). (PF)
