This visualization displays a hierarchical tree of terrorist organizations, categorized by ideology (such as armed forces, communist, and islam) and organized by year of origin. The data is loaded from a local JSON file and rendered as an SVG using the D3.js v5 library. The tree layout uses `d3.tree` and `d3.hierarchy` to compute node positions, while `d3.linkHorizontal` draws the connecting paths. Text labels have varying font sizes based on depth, and the entire visualization supports pan and zoom via `d3.zoom`.