Battle of Ongjin
1950 CE.
Shown on the map at 41.766°, 129.816°.
The Battle of Ongjin Peninsula (Korean: 옹진반도 전투; Hanja: 甕津半島 戰鬪) was a series of battles that occurred in Ongjin Peninsula between 25 and 26 June 1950 and was a part of the Operation Pokpung (North Korea) and Operation Western Region (South Korea) that marked the beginning of the Korean War. On 25 June, the Korean People's Army (KPA) 3rd 38-Guard Brigade, reinforced with the 1st Infantry Regiment of the 6th Infantry Division, launched a surprise attack on the Republic of Korea Army (ROKA) 17th Infantry Regiment in Ongjin Peninsula, modern-day Ongjin and Kangryong. The battle ended on 26 June with a KPA victory, but many ROKA troops were able to escape from the peninsula.
Text from the Wikipedia article Battle of Ongjin Peninsula, licensed CC BY-SA 4.0.