Who are the Amutzim?
Rashi: They are Malchus Aram.
Radak: This hints to Malchus Yishmael.
Why is no direction specified for the Amutzim?
Radak: They invigorated themselves to seek kingship in any place possible.
What will the Amutzim seek and request?
Rashi: They will request from Hashem great length for their rule, to go in the entire land.
Refer to 6:7:2:1.
Malbim: They wanted to go to the land of the Berudim and seize their kingship. However, they will not succeed; they will fall around Yerushalayim in the war of Gog and Magog.
What was the answer "Lechu His'halechu va'Aretz"?
Rashi: They were authorized to have a great rule.
Radak: They were authorized to conquer lands.
Malbim: This refers to all four kingdoms discussed. There was a decree that they rule in the land until "Ketz ha'Yamin 1 " (Daniel 12:13).
They will not rule together. Rather, collectively their rules will extend until the end of days. (PF)