155^th Infantry Regiment

The 155th Infantry Regiment was a Mississippi National Guard regiment inducted at Vicksburg on November 20, 1940 and assigned to the 31st Division. After training in Florida, Texas, Louisiana, Mississippi, and Virginia, it departed Hampton Roads on March 2, 1944 and reached Oro Bay, New Guinea, in April. During the summer it served with the 31st Division in the Maffin Bay and Wakde-Sarmi area, where the division relieved the 6th Infantry Division, guarded the staging area, and conducted patrols before preparing for Morotai.

The regiment assaulted Morotai on September 15, 1944 as part of TRADEWIND Assault Force. Landing on the northern half of Red Beach beside the 167th Infantry, the 155th secured its beach sector without serious opposition and advanced inland roughly 2,000 yards to the D-Day objective line. After the Morotai perimeter was established, the regiment remained with the division during the island's defense, security, and base-development mission. Its combat role became more substantial in 1945 when the division moved to Mindanao.

The 155th landed at Parang on April 22, 1945 after the area had been secured and entered the Sayre Highway campaign behind the 124th Infantry. Once the 124th had reached Kibawe and fought through Colgan Woods, the 155th was ordered to continue the northward drive. On May 13 it passed through the 124th and advanced toward Malaybalay despite demolitions, poor roads, rain, and supply problems. By May 20 the regiment was on ground commanding Malaybalay; on May 21 it took the town, a Japanese supply base, and then Kalasungay. On May 23 it made contact with the 108th Infantry south of Impalutao, opening the full length of Sayre Highway. In the pursuit phase, a battalion combat team moved by engineer landing craft up the Agusan River and assembled near Waloe as Japanese forces withdrew deeper into Mindanao.