This chart displays military expenditure as a percentage of GDP for seven countries from 2001 to 2021, using a color-coded line chart with a legend. The visualization highlights trends and comparisons over time, with each country represented by a distinct line. Built with D3 v5, it uses SVG rendering and scales such as `scaleTime` and `scaleLinear` for axes, along with `nest` and `line` to create the paths. The data is loaded from a CSV file, and a custom legend is constructed using the `colorLegend` module.