Schematic plan · Korean War

Battle of the Imjin River

23 April 1951
Korea
Victory for North Korea

All battles The event in the chronicle Wikipedia

A schematic plan, generated from the statistics of the CAA Database of Battles: the armies' size and width, the hours of fighting, the plan of attack and the outcome are as recorded; the ground and the positions are not.

North Korea (Nkor Army, 30,700 men under unrecorded commanders) attacked USA (US Div, 26,900 men under unrecorded commanders) in Korea. The CAA Database of Battles records 96 hours of fighting on a front of 24 km, a frontal attack against delaying action, and that North Korea won. Losses: North Korea 5,730 (19%), USA 470 (2%).

This plan is generated from those figures. It shows the shape of the battle the database describes: the size and width of the armies, the plan of attack and the outcome. It does not show where the units actually stood.

The armies

North Korea

Unit	Arm	Men
North Korea left wing	Infantry	6,504
North Korea centre	Infantry	8,672
North Korea right wing	Infantry	6,504
North Korea reserve	Infantry	5,420
North Korea artillery (240 guns)	Artillery	3,600
North Korea command	Commander	—
In this plan		30,700

USA

Unit	Arm	Men
USA left wing	Infantry	5,939
USA centre	Infantry	7,918
USA right wing	Infantry	5,939
USA reserve	Infantry	4,949
USA artillery (72 guns)	Artillery	1,080
USA armour (215 tanks)	Armour	1,075
USA command	Commander	—
In this plan		26,900

What the sources report

	North Korea	USA
Strength, this plan	30,700	26,900
Losses, this plan	5,730	470

In the CAA Database of Battles

CDB90 no. 634, “Kansas Line”, compiled for the US Army to study what decides battles. These are the figures a what-if engine can be calibrated against.

Fighting: 96 hours
Winner: the attacker
Weather: Wet, Light precipitation, Temperate, Spring, Temperate
Defender’s posture: Delaying action
Front width: 24 km (attacker), null km (defender)

Force	Strength	Losses	Horse	Guns	Plan and outcome
North Koreaattacker	30,700	5,730	0	240	Penetration
USAdefender	26,900	470	0	72	Withdrew

Attacker’s advantages none recorded

CDB90 (US Army Concepts Analysis Agency, 1990), tidy edition by Jeffrey B. Arnold; data under ODC-BY 1.0.

Notes

On this reconstruction

Generated automatically from the statistics in CDB90. Frontages, depths, distances, the order of events and the terrain are schematic: they follow the recorded strengths, front widths, hours of fighting, tactical plan and outcome, not maps or accounts of the battle. The sources give no hours; the timing is conjectural.

Sources

US Army Concepts Analysis Agency; tidy edition by Jeffrey B. Arnold, CAA Database of Battles (CDB90), no. 634 · ODC-BY-1.0Strengths, losses, front widths, hours of fighting, tactics and outcome.
Wikipedia contributors, Battle of the Imjin River · CC-BY-SA-4.0

Facts gathered from Wikidata (CC0), Wikipedia (CC BY-SA 4.0) and Wikimedia Commons (licence per file); the plan and its text are timeastra’s own.