From 1966 to 1969 the U. S. suffered 75 killed in action and 111 wounded in action; the ROK lost 299 KIA and 550 WIA. By comparison the NKPA suffered 397 KIA.
1966
* 2 November: 2ID patrol (1st Battalion, 23rd Infantry Regiment) ambushed south of DMZ. Six U.S. KIA, one KATUSA KIA, one U.S. WIA; unknown KPA losses.
1967
* 12 February: 2ID patrol (3-23 Infantry) ambushed south of DMZ. One U.S. KIA; unknown KPA losses.
* 5 April: 2ID guard post engaged KPA infiltrators south of DMZ. No U.S. losses; five KPA KIA.
* 29 April: 2ID patrol ambushed KPA infiltrators south of DMZ. No U.S. losses; one KPA KIA, one KPA WIA, one KPA captured.
* 22 May: 2ID barracks (1-23 Infantry) demolished by daylight explosion south of DMZ. Two U.S. KIA, seventeen U.S. WIA.
* 16 July: 2ID guard post attacked south of DMZ. Three U.S. KIA, two U.S. WIA; unknown KPA losses.
* 10 August: 7ID construction team (13th Engineers) ambushed well south of DMZ in daylight. Three U.S. KIA, sixteen U.S. WIA; unknown KPA losses.
* 22 August: 2ID jeep destroyed by mine and ambush south of DMZ. One U.S. KIA, one U.S. WIA; unknown KPA losses.
* 28 August: Eighth Army construction team (76th Engineers) ambushed in daylight near the Joint Security Area but still south of the DMZ. Two U.S. KIA, two KATUSA KIA, fourteen U.S. WIA, nine KATUSA WIA, three civilians WIA; unknown KPA losses.
* 29 August: 2ID jeep destroyed by mine south of DMZ. Three U.S. KIA, five U.S. WIA; no KPA losses.
* 7 October: 2ID patrol boat ambushed on Imjin River south of DMZ. One U.S. KIA; unknown KPA losses.
1968
* 20–21 January: 31 North Korean commandos crossed the border disguised as South Korean soldiers in an attempt to assassinate President Park Chung Hee at The Blue House. The failed Blue House Raid mission by Unit 124 resulted in 29 commandos killed, one committed suicide, and the last captured. Two South Korean policemen and five civilians were killed by the commandos. Other reports indicated as many as 68 South Koreans killed and 66 wounded, including about 24 civilians. Three Americans were killed and another three wounded in an attempt to prevent the commandos from escaping back via the DMZ.
* 22 January: U.S. 2nd Infantry Division guard post engaged by KPA infiltrators. Three U.S. WIA; unknown KPA losses.
* 23 January: Seizure of the USS Pueblo (AGER-2) off the east coast of the DPRK
* 24 January: 2ID position (1-23 Infantry) attacked south of DMZ by KPA Unit 124 exfiltrators. Two U.S. KIA; three KPA WIA.
* 26 January: 2ID defensive position (2-72 Armor) attacked south of DMZ by KPA Unit 124 exfiltrators
* 29 January: 2ID patrols and outposts engaged and repulsed four teams of KPA infiltrators. No U.S. losses; unknown KPA losses.
* 6 February: 2ID guard post attacked. No U.S. losses; one KPA WIA.
* 27 March: 2ID reaction forces and ROK 25th Infantry Division ambushed KPA infiltrators. No U.S. losses; three KPA KIA.
* 14 April: U.S. Army Support Group truck ambushed south of the Joint Security Area in daylight. Two U.S. KIA, two KATUSA KIA, two U.S. WIA; unknown KPA losses.
* 21 April: 7ID patrol (2nd Battalion, 31st Infantry Regiment)) engaged KPA infiltrator company in the DMZ. One U.S. KIA, three U.S. WIA; five KPA KIA, fifteen KPA WIA.
* 27 April: 7ID patrol (2-31 Infantry) ambushed in the DMZ. One KATUSA KIA, two U.S. WIA; unknown KPA losses.
* 3 July: 2ID patrol ambushed in the DMZ. One U.S. WIA; unknown KPA losses.
* 20 July: 2ID patrol ambushed in the DMZ. One U.S. KIA; unknown KPA losses. 7ID patrol (1st Battalion, 32nd Infantry Regiment) ambushed in the DMZ. One U.S. KIA; unknown KPA losses.
* 21 July: 2ID patrol (2nd Battalion, 38th Infantry Regiment) ambushed in the DMZ. One U.S. WIA, one KATUSA WIA.
* 30 July: 2ID patrol (3-23 Infantry) ambushed in the DMZ. One U.S. KIA, three U.S. WIA; unknown KPA losses.
* 5 August: 2ID patrol (1-38 Infantry) ambushed south of the DMZ in daylight. One U.S. KIA, four U.S. WIA; one KPA KIA.
* 18 August: 7ID patrol (1-32 Infantry) ambushed south of the DMZ. Two U.S. KIA; two KPA WIA.
* 19 September: 2ID patrols (2-38 Infantry) and quick reaction forces (4th Squadron, 7th Cavalry Regiment, 2nd Battalion, 9th Infantry Regiment (Mechanized), and the 2nd Division Counter Agent Company) isolated and destroyed KPA infiltrator squad. Two KATUSA KIA, six KATUSA WIA; four KPA KIA, one KPA WIA.
* 27 September: 2ID jeep ambushed in the DMZ. Two U.S. KIA; unknown KPA losses.
* 3 October: 7ID guard post (1-31 Infantry) engaged KPA exfiltrator south of DMZ. No U.S. losses; one KPA KIA.
* 5 October: 2ID patrol ambushed in the DMZ. One U.S. KIA, two U.S. WIA; unknown KPA losses.
* 10 October: 2ID boat patrol engaged KPA infiltrator crossing the Imjin River. No U.S. losses; one KPA KIA.
* 11 October: 2ID patrol ambushed KPA infiltrators in the DMZ. No U.S. losses; two KPA KIA.
* 23 October: 2ID patrol engaged KPA infiltrators in the DMZ. One U.S. KIA, five U.S. WIA; one KPA KIA.
* 30 October: Ulchin-Samcheok (Gangwon-do) landings by 120-13- men of KPA Unit 124; 110 of them were killed, 7 were captured and 13 escaped.
1969
* 23 January: 2ID guard posts repulsed KPA infiltrators. No U.S. losses; unknown KPA losses.
* 4 February: 2ID guard posts repulsed KPA infiltrators. No U.S. losses; unknown KPA losses.
* 13 March: 2ID fence repair patrol (2-38 Infantry) engaged by KPA infiltrators. No U.S. losses; unknown KPA losses.
* 15 March: 2ID marker maintenance patrol ambushed in the DMZ. One U.S. KIA, two U.S. WIA, one KATUSA WIA. Medical evacuation helicopter crashed after takeoff, killing five airmen and the three wounded.
* 16 March: 2ID patrol engaged KPA infiltrators in the DMZ. No U.S. losses; unknown KPA losses.
* 20 March: 2ID patrol engaged KPA patrol in the DMZ. No U.S. losses; unknown KPA losses.
* 29 March: 2ID patrol engaged KPA patrol in the DMZ. No U.S. losses; unknown KPA losses.
* March: Six North Korean infiltrators crossed the border near Chumunjin, Gangwon-do and killed a South Korean policeman on guard duty.[citation needed]
* 15 April: KPAF fighters shoot down a US Navy EC-121 Warning Star aircraft over the Sea of Japan (East Sea)
* 15 May: 2ID patrol engaged KPA infiltrator. One U.S. WIA, one KATUSA WIA; unknown KPA losses.
* 20 May: 2ID guard post engaged KPA infiltrators. No U.S. losses; one KPA KIA.
* 21 July: 2ID guard posts engaged and repulsed KPA infiltrators. No U.S. losses; unknown KPA losses.
* 17 August: Eighth Army helicopter (59th Aviation Company) strayed north of the DMZ and was shot down. Three U.S. captured.
* 18 October: 7ID jeep ambushed in the DMZ. Four U.S. KIA; unknown KPA losses