caption: The image shows a map of the British Empire in the 19th century, depicting the extent of the Indian Ocean. It is a detailed map, showing the various countries and bodies of water that make up the region. The map is filled with intricate details, such as rivers, mountains, and cities, as well as labels for each country. The colors used are mostly shades of blue and green, with some yellow and red accents. The text on the map is written in a bold font, making it easy to read.