1)
What is the definition of "Chalutz??
1.
Refer to 31:5:3:1 & 2.
2)
Why did Moshe mention specifically "Kol Chalutz"?
1.
Oznayim la'Torah: He was telling them that not all the men needed to participate in the conquest of Cana'an, just the most qualified soldiers, and the rest would remain in Eiver ha'Yarden, to keep guard over their towns. 1
1
And that is what in fact transpired. See Oznayim la'Torah, who elaborates.
