Chosin, Toktong Pass (November–December 1950): six days holding the back gate

2026-10-13 · 1950-11-27 – 1950-12-02

Overview (BLUF)

In late November 1950 two regiments of the US 1st Marine Division were at Yudam-ni, west of the Chosin Reservoir. Their only way back to Hagaru-ri was a single 14-mile (22 km) road over Toktong Pass. Fox Company, 2d Battalion, 7th Marines (reinforced, 240 men) took up a lone hill in the middle of the pass on 27 November and from that night faced three night attacks by troops of the CPV 59th Division. When two relief attempts were turned back, the company commander asked to stand fast on air resupply rather than fight his way out. The company held until 1125 on 2 December, when 1st Battalion, 7th Marines arrived across the mountains.

A single company combined ground, all-round defence, a dedicated battery and air resupply to keep its parent formations' road open. The episode also shows how much an isolated unit depends on a higher headquarters' judgement about whether to send relief or pull it back.

A column of Marines halted on a snowy mountain road, with ridges rising behind — Photo 1. November 1950: Marines halted on the road between Yudam-ni and Toktong Pass while other troops clear the ridges — Photo: USMC Archives, CC BY 2.0, via Wikimedia Commons

Background and Strategic Context

In late November US X Corps was advancing in north-east Korea, and the 1st Marine Division had reached Yudam-ni on the west side of the reservoir. The Chosin battle began on the night of 27 November when the CPV 9th Army Group struck the Marines at Yudam-ni (source 3). The main supply route from Hamhung to Yudam-ni was 78 miles long, and its Yudam-ni–Hagaru stretch crossed the 4,000-foot (1,200 m) Toktong Pass (source 1).

Fox Company left Hagaru at noon on the 27th for the pass. Its task was to hold the high ground over the pass and keep open the "back gate" for the two regiments at Yudam-ni. It sat about 7 miles (11 km) from Hagaru and a little over 2 miles (3.5 km) from C Company, 1/7, on Hill 1419 to the west (Figure 1).

Terrain and Weather

The company dug in on an isolated hill just north of the road at the midpoint of the pass. An embankment where the road cut through the base of the hill turned out to help the defence. A rocky promontory on Hill 1653, a few hundred yards north, became a Chinese strongpoint. A full moon lit the nights. On the evening of the 27th the temperature at Yudam-ni fell to 20 degrees below zero Fahrenheit (about −29 °C), and sentries on the hill were numbed by the cold (source 1).

Schematic of Toktong Pass. Left: the road from Yudam-ni to Hagaru-ri with C/1/7, Fox Company on Fox Hill, How Battery at Hagaru, the approach of the CPV 59th Division, where the relief attempts of 28 and 29 November stopped, and the route of 1/7 across the mountains on 1–2 December. Right, an enlarged sketch: the 3d Platoon on the summit, the 1st and 2d Platoons on the flanks, CP and mortars at the base by the road embankment, the drop zone, the ammunition that landed to the west, and the directions of the three night attacks — Figure 1. Toktong Pass, schematic (27 Nov – 2 Dec 1950). Positions and distances are approximate; the enlarged sketch is not to scale — our own drawing, based on source 1

Forces and Dispositions

Fox Company (reinforced): three rifle platoons plus heavy machine-gun and 81mm mortar sections from Weapons Company, 240 officers and men. The 3d Platoon held the summit facing north; the 1st and 2d ran down the right and left slopes and bent back to the road. The CP and the 81mm and 60mm mortars sat at the base of the hill by the road (source 1).
Support: How Battery, 3/11 Marines, stayed at Hagaru with the primary mission of supporting Fox Company. Marine and Australian aircraft provided close air support, and transports flew in supplies (source 1).
CPV: the 59th Division, 20th Army, swung wide to the south-east to cut the road and later held the Toktong Pass area. The regiment that attacked the hill has not been identified (source 1).

Course of the Action

First night (0230–0630, 28 November): Chinese troops, first estimated at company strength and reinforced as the fight went on, hit the north, west and south arcs. The two forward squads on the summit were pushed back to the reserve squad's line, but the junction of the 2d and 3d Platoons held. Chinese walking down the road stumbled into the CP and mortars; the crews climbed to a tree line, and the road embankment stopped the pursuit. By about 0630 the attack had lost its organization.
Surrounded (28 November, daytime): at 1030 Australian F-51s struck the Hill 1653 redoubt. The company gathered weapons and ammunition and sent out patrols, and Marine R5Ds dropped medical supplies and ammunition. A relief force from Hagaru (Weapons Company and three tanks) set out at 0930 but was turned back halfway.
Second night (0215, 29 November): about 40 Chinese broke into the 3d Platoon, which fell back some 20 yards and retook the ground in a counterattack at sunrise. The company commander and the 3d Platoon leader were wounded in the leg and stayed in action.
Resupply and recovery (29 November): at 1030 drops landed accurately on a zone marked with coloured parachutes, and a helicopter brought in radio batteries. Some afternoon C-119 drops fell about 500 yards west. A composite battalion that had left Yudam-ni at 0800 was recalled at 1315.
Third night (0200, 30 November): after a voice in English called on the company to surrender, an attack came across the valley from the south. The company fired 81mm illumination and machine guns. For the first time it had enough mortar rounds and grenades, and the attack broke.
Link-up (2 December): 1/7 crossed the mountains overnight, and Fox Company controlled a VMF-312 strike by radio to support the battalion's final attack. At 1125 its lead troops reached Fox Company's lines.

Air transports dropping supplies by parachute over a snowy valley, with many parachutes in the sky — Photo 2. Airdrop at Yudam-ni, 29 November 1950. On the same day Fox Company in Toktong Pass was also resupplied from the air — Photo: USMC Archives, CC BY 2.0, via Wikimedia Commons

The official history records Fox Company's losses as 26 dead, 3 missing and 89 wounded. Six of its seven officers were wounded, and almost all of the unwounded men suffered frostbite and digestive illness (source 1).

Timeline from noon on 27 November to noon on 2 December 1950. The Fox Company row shows night-attack bars before dawn on the 28th, 29th and 30th and the link-up at 1125 on 2 December; the airdrop row shows the R5D drop on the 28th, the accurate drop at 1030 on the 29th and the ammunition recovery at dusk on the 29th; the relief row shows the Hagaru relief on the 28th, the Yudam-ni composite battalion on the 29th and 1/7's march across the mountains on 1–2 December — Figure 2. Toktong Pass timeline. Numbers refer to the list below the chart — our own drawing, based on source 1

Decision Point Analysis

Matrix of four decision points with the options open and the choice made. DP 1, company commander: all-round defence on the isolated hill north of the road. DP 2, company commander: hold, gather arms, patrol and ask for airdrops. DP 3, CPV command: repeated night attacks. DP 4, company commander: recover the ammunition at dusk under artillery cover — Figure 3. Decision points: options and choices. The orange border marks the course actually taken. DP 3 is inferred from Chinese actions, as CPV records were not consulted — our own drawing, based on sources 1 and 2

DP 1: siting the position (Fox Company commander, 27 November) — scenario phase 1 Of (a) an all-round defence on the isolated hill north of the road, (b) a block across the road at the floor of the pass, (c) splitting the company across both sides of the road, or (d) seizing the higher Hill 1653, he chose (a). He appears to have judged it a hill that overlooked the road directly and that 240 men could fill. A roadblock would have been overlooked from every side, a split company could not support itself, and Hill 1653 was too big and too far. On the first night part of the summit was lost, but the position as a whole held.

DP 2: stand instead of breaking out (Fox Company commander, morning of 28 November) — scenario phase 3 The plan had Fox Company fight its way out of the pass. Fifty-four wounded and the ring of Chinese around the hill made that impossible (source 1). According to his Medal of Honor citation, when radioed to fight back toward a relieving force, the company commander asked to stand fast if he was supplied by air (source 2). He would not abandon the wounded or give up the pass. The company gathered weapons, patrolled and held. The regiment, meanwhile, pulled back 1/7 on the 28th and the composite battalion on the 29th rather than risk having them trapped. As a result Fox Company held on alone for four more days.

DP 3: how to attack (CPV command, 28–30 November) CPV records were not consulted, so this is inferred from what the Chinese did. They could (a) keep attacking at night to take the hill, (b) simply ring the hill and concentrate on blocking relief, or (c) attack by day. They blocked relief columns by day and attacked the hill every night. But each attack came from a different direction and piecemeal, and in between the company restocked from the air.

DP 4: ammunition outside the wire (Fox Company commander, afternoon of 29 November) — scenario phase 6 A first party sent for the mortar rounds that had landed about 500 yards west was pinned down by fire. Of (a) recovering them at dusk under How Battery's covering fire, (b) sending another party at once in daylight, (c) leaving them and rationing what was on hand, or (d) pulling the 3d Platoon off the summit, he chose (a). The party brought the ammunition in without interference, and the company went into the third night with enough mortar rounds and grenades for the first time.

Lessons

All-round defence and ground: a perimeter on the dominating hill, closed on every side and with its CP by the road, held even against an enemy who arrived from an unexpected direction (FM 3-90, source 5).
Sustainment: marking the drop zone with coloured parachutes, a small step, changed the accuracy of resupply. When to recover ammunition decided how the next night went.
Fire support: a battery whose primary mission was this one company, 81mm illumination and air strikes controlled by the company itself made up for its numbers.
Mission command: measured against the higher intent of keeping the back gate open, the company commander proposed holding instead of the planned withdrawal — the judgement of a subordinate who understood the intent (ADP 6-0, source 4).
Cold: the cold wore down men, weapons and medical care alike.

Unresolved Questions

Chinese strength and regiment: the official history estimates the first attack at company strength; the citation says regimental strength. The attacking regiment has not been identified.
Starting strength and Chinese losses: 240 (official history) against 220 (citation). Estimates of Chinese losses, from several hundred to about 1,000, have not been independently verified.
Timing of the request to stand fast: the exact hour of the radio order and the reply is unconfirmed.
30 November – 1 December: little is recorded for the hill between the third night and the link-up.
Hill 1653: probably the same peak as Toktong-san (1,653 m) in Changjin County, but this is unconfirmed.

You can command this battle yourself in the training scenario "Chosin: Toktong Pass", as the Fox Company commander. Try making the same decisions with the same information on an isolated hill.

Sources

USMC Historical Branch, U.S. Marine Operations in Korea 1950–1953, Vol. III: The Chosin Reservoir Campaign (1957), chs. IX–XII (Project Gutenberg e-text). https://www.gutenberg.org/ebooks/65009 (accessed 2026-10-13)
Arlington National Cemetery (US Army), Medal of Honor citation of the Fox Company commander. https://www.arlingtoncemetery.mil/Explore/Notable-Graves/Medal-of-Honor-Recipients/Korean-War-MoH-recipients/William-E-Barber (accessed 2026-10-13)
Academy of Korean Studies, Encyclopedia of Korean Culture, "Jangjinho jeontu" (Battle of the Chosin Reservoir, in Korean). https://encykorea.aks.ac.kr/Article/E0048824 (accessed 2026-10-13)
US Army, ADP 6-0 Mission Command. https://armypubs.army.mil/ProductMaps/PubForm/ADP.aspx (accessed 2026-10-13)
US Army, FM 3-90 Tactics (defensive operations). https://armypubs.army.mil/ProductMaps/PubForm/FM.aspx (accessed 2026-10-13)
Marine Corps University, Commandership at the Chosin Reservoir, Part B (teaching material; search summary only). https://www.usmcu.edu/Portals/218/CEME/courses/Chosin%20-%20Commandership%20at%20the%20Chosin%20Reservoir%20Part%20B.pdf (accessed 2026-10-13)
Wikimedia Commons, file page for the photograph of Marines on the Yudam-ni–Toktong Pass road (CC BY 2.0). https://commons.wikimedia.org/wiki/File:Marines_on_the_Road_Between_Yudam-ni_and_Toktong_Pass,_November_1950_(8225088828).jpg (accessed 2026-10-13)
Wikimedia Commons, file page for the Yudam-ni airdrop photograph (CC BY 2.0). https://commons.wikimedia.org/wiki/File:Supply_Airdrop,_Yudam-ni,_29_November_1950_(8225088764).jpg (accessed 2026-10-13)