caption: The image shows a map of the Russian Empire in the 19th century, with text and color boxes indicating the extent of the Soviet Union. The map is detailed, showing the various provinces and cities of the region, as well as the various bodies of water and other geographical features. The colors used in the map are mostly shades of blue, green, and yellow, with some hints of red and orange. The text on the map is written in a bold font and is surrounded by a thin black border.