This interactive D3.js v7 visualization reimagines Charles Joseph Minard’s classic flow map of Napoleon’s 1812 Russian campaign, showing the shrinking size of the French army as a colored path whose width reflects troop count. It uses `d3.csvParse` on embedded data, `d3.group` to separate the main army from flank detachments, and SVG paths with hover effects to reveal troop numbers. A red temperature line, city markers, and annotated events illustrate the retreat’s plummeting temperatures, rendered with axes and tooltips in a Serif-styled layout.