Shared ground
These verses are mainly logistical: they describe how the king’s order was carried out on the ground. Joab and the officers move through a wide sweep of territory, take a long time to do it (nine months and twenty days), return to Jerusalem, and deliver totals to the king (vv. 5–9). The counted group is explicitly military: “men who draw the sword,” described as “valiant” or “strong” (v. 9). That makes the census look like an assessment of fighting capacity, not a general population report.
The narrative also keeps highlighting boundaries and scope. The route reaches from the Transjordan (east of the Jordan) up toward the far north and coastal powers (Sidon/Tyre), and then down through Judah to Beersheba in the far south (vv. 5–7). The effect is to portray an extensive, kingdom-wide administrative action.
Where interpretation differs
One question is how to read the place names and route details. Some readers take the itinerary as a fairly exact travel log; others think some names are unclear enough (for example “Tahtim-hodshi” and “Dan-jaan”) that the text’s main point is the breadth of coverage rather than a map you can trace with confidence.
A second question is how the totals relate to Israel and Judah. The report distinguishes “Israel” from “Judah” (v. 9). Some take “Israel” here as the northern tribes in contrast to Judah; others think “Israel” can sometimes be used more broadly for the people as a whole, with Judah then singled out for separate reporting.
Why the disagreement exists
The Hebrew place names in vv. 6–7 are difficult, and the Bible’s other geographic lists do not always use the same labels. Also, “Israel” is used in more than one way across Samuel: sometimes it can mean the whole nation, and sometimes it contrasts with Judah.
What this passage clearly contributes
Explicitly, the text supplies the scope, duration, and results of the census: Joab’s team covered the land and reported 800,000 sword-bearing men for Israel and 500,000 for Judah (v. 9), after a lengthy tour ending in Jerusalem (v. 8). By focusing on fighting men, the passage frames the census as a military-strength measure. As a narrative step, it sets up what follows after the numbers are delivered (cf. 2 Samuel 24:10), but the moral evaluation of the census is mostly handled outside these verses rather than inside them.