Inchon-Seoul campaign

When the Korean War started, Lieutenant Colonel Sutter was given command of 2nd Battalion, 1st Marines. Sutter led his battalion during the amphibious assault at Blue Beach One at Inchon on September 15, 1950. His first wave of Marines landed at 1730 hours, followed shortly after by a second wave. However, the next three waves from his battalion drifted off course and mistakenly landed on Blue Beach Three.^[4]

By the afternoon of September 16, Sutter's battalion had pushed two miles inland and had taken Hill 117 which overlooked the highway toward Seoul. Later that night, his battalion helped repel a North Korean counterattack. Early on the morning of September 20, his battalion destroyed another enemy counterattack which was composed of five tanks and 300 men outside of Yongdung-po. Private First Class Walter C. Monegan Jr. personally destroyed two T-34s before he was killed. Later that day, Sutter requested an artillery fire mission which took seven hours to be approved.^[4]

On the morning of September 21, Sutter's battalion took particularly heavy casualties while attacking Yongdung-po.^[5] After reaching the Han River outside of Seoul on September 22, his battalion was placed in the regimental reserve. 2/1 had sustained 116 casualties as a result of seven days of aggressively assaulting "without the required artillery preparation."^[4]

On September 26, Sutter continued to lead 2/1 in urban combat during the recapture of Seoul. The house-to-house fighting was agonizingly slow for the Marines, who would typically spend one hour clearing each position. While the city was effectively secured by September 28, there were still enemy pockets of resistance for the next few days. On September 29, an observation post occupied by Company E on Hill 132 was attacked by approximately 100 of the enemy. Private First Class Stanley R. Christianson remained in a listening post where he personally killed seven of the enemy before he himself was killed and bought time for his platoon to mount a defense which repelled the attack.^[5]

Chosin Reservoir campaign

At the conclusion of the Inchon-Seoul campaign in the first week of October, the entire 1st Marine Division embarked on Navy ships and sailed around South Korea and landed at Wonsan on October 26. The division then marched 70 miles north to the Chosin Reservoir area. As Sutter's battalion arrived at Koto-ri on November 24, the Chinese Communist military encircled the entire division and the coldest winter in 50 years descended on Korea. Temperatures fell as low as −35 °F as a blizzard swept the area.^[6]

On the night of November 29, a large enemy force assaulted 2/1's entrenched position outside of Koto-ri. Lieutenant Colonel Sutter skillfully directed his Marines in repulsing the attack, killing 175 of the enemy and wounding several hundred more. On December 10, Sutter led his Marines in an attack toward Sudong-ni. He attained his objective with minimal losses despite suffering from a fever. The Marines reached Hungnam by December 11 and were evacuated by ships by December 24. For his actions during the Chosin Reservoir campaign, Sutter was awarded the Navy Cross.^[6][7]

Sutter continued serving in Korea and eventually became the executive officer of the 1st Marine Regiment.^[1] He returned to the United States in May 1951 and was awarded the Legion of Merit for his service.^[7]