Key Facts
- Battle dates
- August 4 – September 15, 1950
- Duration
- ~6 weeks
- UN supply source
- Large materiel stockpile in nearby Japan
- North Korean supply support
- Soviet Union and China
- UN force composition
- Primarily ROK, US, and UK troops
Strategic Narrative Overview
Throughout the battle, UN forces leveraged overwhelming air and sea superiority to interdict North Korean supply lines, slowing deliveries to the front. Meanwhile, the UN efficiently moved personnel and materiel from Japan to Busan, steadily improving its logistical position. North Korean units, frequently cut off from their depots despite Soviet and Chinese support, faced critical shortages during several key engagements, undermining offensive operations against the perimeter.
01 / The Origins
Following North Korea's invasion of South Korea in June 1950, UN forces were pushed back to a defensive perimeter around Busan. The logistical dimension of this fight was shaped by geography and air power: the UN held nearby Japan as a massive supply base, while North Korea depended on long, exposed overland routes vulnerable to interdiction. Both sides' ability to sustain troops at the front became as critical as battlefield tactics.
03 / The Outcome
The UN's logistical advantage contributed directly to holding the Pusan Perimeter and enabled the subsequent Battle of Inchon. The North Korean army, its supply lines severed and forces attrited, was defeated around Busan. The success of UN logistics during this period established a template for sustaining combined forces in the Korean peninsula throughout the wider conflict.
Belligerents & Mobilization Analysis
Side A
3 belligerents
Side B
1 belligerent
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.