Unit 1 (v. 1a): A heading for a list of defeated rulers
Joshua 12:1 begins, “Now these are the kings of the land,” signaling an upcoming enumeration. It specifies that these kings were ones Israel “struck,” and that Israel “possessed their land,” emphasizing both military defeat and subsequent control of territory.
Unit 2 (v. 1b): Where the land is—east of the Jordan
The land is described as “beyond the Jordan toward the sunrise,” a directional way of saying the eastern side. One key term names this orientation explicitly as eastern. The point is to locate these victories as east-bank holdings rather than the later west-bank conquests.
Unit 3 (v. 1c): The boundaries—south to north, and the rift valley region
The verse outlines the span “from the valley of the Arnon to Mount Hermon,” giving a south-to-north range. It adds “all the Arabah eastward,” broadening the description to include the Jordan rift valley region on that side. The logic moves from general location (east of Jordan) to specific border markers (Arnon, Hermon) to a regional descriptor (the Arabah).