Disturbance of the Three Ports

The Disturbance of the Three Ports, also known as Sampo Waeran (Korean: 삼포왜란) or Sanpo no Ran (Japanese: 三浦の乱), refers to riots in 1510 by Japanese citizens residing in the Korean port cities Dongnae, Changwon and Ulsan. They killed the Commander of Busan (Busan Cheomsa 釜山僉使), kidnapped the Commander of Jepo (Jepo Cheomsa 薺浦僉使), besieged Ungcheon Fortress, and plundered nearby villages, throwing the Sampo region into chaos.

Source: Wikipedia — Disturbance of the Three Ports (CC BY-SA 4.0)