Key Facts
- Date
- 6–7 June 1920
- Japanese soldiers killed
- 157 regular soldiers + ~120 at border post
- Japanese soldiers wounded
- ~200
- Location
- Bongo-dong Valley, Manchuria
- Duration
- 2 days
Strategic Narrative Overview
The battle opened when Korean independence forces attacked and destroyed a Japanese military police border post, killing approximately 120 soldiers. The Koreans then deliberately lured pursuing Japanese troops toward Bongo-dong Valley, where a reorganized combined force had prepared an ambush. When Japanese regular army units entered the valley and fell within the siege, the independence army opened fire simultaneously, inflicting heavy casualties in a coordinated and well-planned operation.
01 / The Origins
Following Japan's annexation of Korea in 1910, Korean independence movements established armed militias operating from Manchuria. By 1920, these forces had grown sufficiently organized to challenge Japanese military units along the border. Commanders Hong Beom-do and Choi Jin-dong led Korean independence armies that sought to strike Japanese forces and demonstrate that armed resistance to colonial rule was viable, galvanizing domestic and diaspora support for the independence movement.
03 / The Outcome
The ambush resulted in 157 Japanese regular soldiers killed and roughly 200 wounded, representing a decisive tactical victory for the Korean independence forces. The outcome boosted morale across the Korean independence movement and demonstrated that disciplined guerrilla tactics and careful operational planning could overcome Japanese military strength. The battle became one of the most celebrated engagements in Korean resistance history against Japanese colonial rule.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Hong Beom-do, Choi Jin-dong.
Side B
1 belligerent
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.