This example shows the hierarchical structure of the 82nd Airborne Division as a horizontal tree layout, with colored nodes indicating depth from the root division down to individual companies. It uses D3 v7’s `d3.stratify()` to convert parent-child data rows into a hierarchy, then applies the `d3.tree()` layout to position nodes. SVG circles and text labels are rendered via data joins, while `d3.linkHorizontal()` generates the connecting paths.