The Yangtze River Crossing Campaign Victory Memorial Hall covers the 1949 military campaign that brought Nanjing under Communist control. Exhibits focus on the river crossing, the soldiers involved, and the political turning point it represented at the end of the Chinese Civil War.
It is a more specialised stop than Nanjing's headline museums, but worthwhile if you are trying to understand the city's 20th-century layers. The location near the Yangtze also helps connect the displays to the geography that made the campaign so important.