Democratic Republic of the Congo–Rwanda relations
Modern relations between the Democratic Republic of the Congo and Rwanda have origins that date back to the European colonial era. Sharing a border that is 221 km (137.32 mi) in length, the two countries were both colonial possessions of Belgium between 1919 and 1960, and were impacted by the two world wars.
Source: Wikipedia — Democratic Republic of the Congo–Rwanda relations (CC BY-SA 4.0)