The Wanshan Archipelago Campaign (万山群岛战役) was a campaign fought between the communist and the nationalist forces during the Chinese Civil War for the control of Wanshan Archipelago (Wanshan Qundao,万山群岛), and resulted in communist victory. The archipelago consists of 48 islands strategically located at the mouth of the Pearl River, a chokepoint on the communication lines to Hong Kong and Macau. The largest island is the Laurel Mountain (Guishan, 桂山) Island, which was formerly known as Trash Tail (Lajiwei, 垃圾尾) Island. Other major islands include Outer Linding (Wailinding, 外伶仃) Island, Dong'ao (东澳) Island, Tri-gate (Sanmen, 三门) Island, Greater Ten-thousand Mountain (Da Wanshan, 大万山) Island, Lesser Ten-thousand Mountain (Xiao Wanshan, 小万山) Island, Burden Pole (Dangan, 担杆) Islands, and Jianpeng (佳蓬) Islands.