Shared ground
Joshua 12:1 functions as a heading and map-like description for a list that follows. The text explicitly claims that Israel “struck” certain kings and then “possessed” their land. It also explicitly locates these victories “beyond the Jordan toward the sunrise,” meaning the east side of the Jordan River, and it frames the area by recognizable landmarks: from the Arnon valley in the south to Mount Hermon in the north, including the Arabah on the eastern side.
This verse is not a battle story. It is a summary that treats conquest as both a military outcome (defeated rulers) and a territorial outcome (land held). It prepares the reader to think in terms of geography and boundaries before names are listed.
Where interpretation differs
One difference concerns perspective in the phrase “beyond the Jordan.” Some read it as written from a west-of-Jordan standpoint (so “beyond” means “over there to the east”), while others say it can simply be a conventional directional label regardless of where the speaker is standing.
Another difference is how to map “all the Arabah eastward.” Some take it broadly as the whole rift-valley region on that side, while others take it more narrowly as the Jordan valley stretch relevant to the eastern kingdoms being summarized.
A third difference is what “struck” implies. Some understand it as complete removal of opposition, while others take it as plain military defeat sufficient for control, without claiming that every person was eliminated.
Why the disagreement exists
The verse uses compact boundary language rather than detailed cartography. Terms like “beyond,” “Arabah,” and “struck” can be precise in one context but flexible in another, especially when a text is giving a headline summary rather than describing events.
What this passage clearly contributes
It anchors Israel’s remembered history in concrete places and outcomes: identifiable rulers were defeated, and identifiable territory came under Israel’s control. It also sets up Joshua 12 as a record-like recap rather than a new campaign narrative, narrowing the scope here to east-of-Jordan holdings before any west-of-Jordan listing begins (see Joshua 12:1).