1)
Why does it say "va'Yishme'u"?
1.
Malbim: They heeded the rumors that it was built for evil, and did not judge them favorably.
2)
What is the meaning of "la'Tzava"?
1.
Radak: It is like bi'Tzava. We find like this
3)
Why did Bnei Yisrael prepare for war?
1.
Rashi: Bamos were forbidden once the Mishkan was fixed in Shilo.