1)
What is the meaning of "Kol ha'Aretz"?
1.
Radak: It is all Amei ha'Aretz, i.e. all the soldiers and those who were added to them. 1
1
Radak: This is like "v'Chol ha'Aretz Ba'u Mitzraymah" (Bereishis 41:57).
2)
What was the Devash?