Siege of Changchun
1948 CE.
Shown on the map at 43.900°, 125.200°.
The siege of Changchun was a military blockade undertaken by the People's Liberation Army against Changchun between May and October 1948, the largest city in Manchuria at the time, and one of the headquarters of the Republic of China Army in Northeast China. It was one of the longest campaigns in the Liaoshen Campaign of the Chinese Civil War.
Text from the Wikipedia article Siege of Changchun, licensed CC BY-SA 4.0.