The frontiers or borders of the Promised Land of Canaan

In Numbers, chapter 34:1-15, once again Yahweh told Moses what the borders were going to be in this Promised Land.  He explained the explicit borders of this new land on the south, west, north, and east. The southern border was vague with only a few know landmarks, like the desert or wilderness of Zin and the Dead Sea.  The border should be along the side of Edom.  Their southern boundary should begin from the end of the Dead Sea on the east, then south of the ascent of Akrabbim, and across to Zin, with its outer limit south of Kadesh-barnea.  Then it should go on to Hazar-addar, and across to Azmon.  This southern boundary shall turn from Azmon to the Wadi of Egypt and terminate at the Great Sea and its coast.  The Mediterranean Sea was the clear simple western boundary.  The northern boundary was from the Great Sea to Mount Hor.  Then from Mount Hor to Lebo-hamath, with the outer limit the boundary of Zedad, extending to Ziphron and ending at Hazar-enan.  This northern border was even more difficult to locate, probably north of Damascus, but it was not clear.  The eastern boundary was from Hazar-enan to Shepham, then to Riblah on the east side of Ain.  This boundary should do down and reach the eastern slope of the Sea of Chinnereth, the Sea of Galilee.  Then the boundary shall go down to the Jordan, ending at the Dead Sea.  This eastern border seemed to be close to the Jordan River since the Gadites, the Reubenites, and the Manassites have already taken the eastern portions across the Jordan.  Moses commanded the Israelites that this was their land that they would inherit by lot.  Yahweh had commanded Moses to give this land to the nine tribes and to the one half-tribe of Manassah.  The tribe of the Reubenites, the tribe of the Gadites, and the half-tribe of Manasseh had taken their inheritance beyond the Jordan eastward.  Everything was settled in theory.  Two and a half tribes had the vague east side.  The rest of the land west of the Jordan River would be split up by ancestral tribe.  If only it was that easy?  Should you give land away that you do not own?