For
World War II, the 162nd Infantry was inducted into Federal service at Portland on 16 September 1940. After the end of the war, the regiment inactivated at
Kure on 31 December 1945. From 1943 until his wounding in early 1944 in New Guinea, the 2nd Battalion of the 162d was commanded by Lieutenant Colonel
Archibald Roosevelt, the son of the 26th US President,
Theodore Roosevelt.
Zamboanga After leaving Biak, the 162nd and the division staged at
Mindoro in preparation for the liberation of the Southern Philippines. The 186th Regimental Combat Team landed on Palawan on 28 February in order to secure airfields there from which the Japanese lines of communication in the
South China Sea could be blockaded. To capture airfields even closer to the
Dutch East Indies and the strategic oilfields of
Borneo, planners selected the southern tip of the
Zamboanga Peninsula on
Mindanao as the next target. The rest of the 41st Infantry Division was committed to this operation, and entered
Basilan Strait early on 10 March. The invasion beaches had been targeted by three days of naval bombardments which had disabled some of the Japanese artillery inland. For the Mindanao operations, the 205th Field Artillery Battalion was organic to the 162nd RCT to provide direct support. The 162nd Infantry was tasked with assaulting the beach near the
barrio of San Mateo, but faced very little resistance from the Japanese. The leading assault wave, touching down around 0915, was faced with light machine gun fire and subsequent troops encountered artillery and mortar fire from the high ground inland, but the regiment suffered no casualties. The 162nd secured the abandoned landing strip of Wolfe Field half a mile inland and spread out in an advance in all three directions outwards from the beachhead. The 163rd Infantry followed within twenty minutes and within several hours had begun advancing directly east on Zamboanga City. Before halting at nightfall, the 162nd advanced 1.5 miles inland and the same distance to the west along the southern coast of the peninsula. By dusk on 11 March, both regiments secured the coastal plain, as the Japanese 54th Independent Mixed Brigade and the rest of the nearly 9,000 Japanese troops on the peninsula had withdrawn to defensive positions on the high ground 2–3 miles inland, from which they could observe the American troops on the beachhead. To the northwest, the advance of the 162nd reached the former Japanese seaplane base of Caldera Bay, while on the inland axis the regiment advanced two miles inland to Malisay and to San Roque a mile and a half southeast of Malisay. The 163rd secured the rubble of Zamboanga City, destroyed in preinvasion bombardment, and captured San Roque Airfield, which was quickly repaired to serve as an airstrip. The 41st then needed to secure the high ground that dominated the San Roque airfield from its Japanese defenders. While the 163rd advanced north from Zamboanga City, the 162nd used two columns with the right flank attacking north from San Roque and the left north from Malisay, with both columns converging on Mount Capisan, 1.5 miles north of Malisay. The advance was slowed by the prepared Japanese defenses that were three miles deep at their strongest, guarded by barbed wire, booby traps, and minefields, and Japanese harassing counterattacks at night. In addition, the difficult terrain that turned into mountainous rain forests to the north further hampered operations as only poor trails existed in the sector of the Japanese defenses, forcing the division to slow its advance so that bulldozers could construct roads for supply and evacuation. However, tanks could not operate off these roads once the advanced reached the foothills of the peninsula. Backed by continuous artillery and
close air support, the 162nd and 163rd methodically advanced northwards, causing the Japanese defenses to disintegrate on 20 March. The two regiments split the defenders between the Mount Pulungbata and Mount Capisan sectors by 23 March and two days later the 162nd overran the last organized resistance near Mount Capisan. This forced the remnants of the central Japanese sector to retreat to the north, while the 163rd took care of the eastern sector. After Mount Capisan was stormed, the regiment was relieved at the end of March and beginning of April, and encamped near Zamboanga. Total division losses during the operations on Zamboanga were 220 killed and 665 wounded. While the rest of the regiment was still on Zamboanga, a reinforced company from the 162nd landed unopposed on
Basilan island on 18 March and swept it and the surrounding islets of Japanese presence, finding none. Company L of the 162nd sent its intelligence and reconnaissance platoon on 26 April to clear the small Sibago island northeast of Basilan of its Japanese defenders, beginning the regiment's last combat action in the Zamboanga sector. Sibago was the site of the lighthouse guiding traffic in Basilan Strait, and its garrison was reported at less than a platoon strength. The platoon landed unopposed after a bombing raid and
PT boat strafing, but lost one wounded and fell back to nearby Lanhil island when it came under fire from a hidden Japanese position. The platoon was reinforced by a strengthened rifle platoon from Company L and two guns of Cannon Company; the American force returned to the island on the next day. Advancing on the lighthouse through jungle, the rifle platoon lost one killed and one wounded to the well-hidden defenders while reporting two Japanese killed. The scouts of the I&R platoon found the lighthouse otherwise inaccessible without climbing equipment and the Company L units returned to the beach to dig in. Another reinforced rifle platoon from Company L was dispatched on 28 April, but renewed attacks that day and the next were similarly unsuccessful with the loss of another wounded. It was not until 30 April that the American force was finally able to defeat the Japanese garrison, recording 58 Japanese dead. It had taken five days for three platoons and two guns with dive bomber and PT boat support to take control of the small island at a cost of one killed and two wounded.
Eastern Mindanao In the first week of May, the 162nd, having accomplished its objectives at Zamboanga was transferred to eastern Mindanao to secure lines of communication. The 24th and 31st Infantry Divisions needed to concentrate their own forces for the main attack against the Japanese rather than being spread out along lines of communication. As a result, Eichelberger transferred the 162nd Regimental Combat Team to
X Corps, freeing up the 24th's
21st Infantry Regiment for the attack. One battalion combat team from the 162nd landed at
Digos to guard the rear of the 24th Infantry Division, while the remainder went to the 31st's sector to secure the region from the coast of
Illana Bay inland to
Kabacan. In the latter, the regiment took over responsibility for the security of the X Corps rear area from
Parang to
Fort Pikit, allowing the
155th Regimental Combat Team of the 31st to join in the advance up the
Sayre Highway. Between 13 and 26 June, elements of the 162nd advanced twenty miles east into the mountains from
Maramag to outflank the Japanese
30th Division at
Silae. Meanwhile, attached to the 24th Infantry Division, the 162nd, having detached the 2nd Battalion and gained the 3rd Battalion, 163rd Infantry, participated in the advance on
Calinan along the Kibawe-Talomo trail from 10 June, pursuing the Japanese
100th Division. The 162nd RCT, including the 3rd Battalion of the 163rd, suffered 25 killed and 85 wounded for a total of 110 casualties during the campaign in eastern Mindanao. The 162nd RCT assisted in mopping up Japanese resistance until 4 July, when they left Davao to rejoin the rest of the division at Zamboanga. Finally out of the "steaming, malarial jungles," the regiment settled down to what the division history described as a "life of comparative ease and luxury." By this point, the Pacific Northwest National Guard character of the division was mostly diluted by replacements from across the country, casualties and the departure home of veteran servicemen: only 12 percent of the officers were Guardsmen, compared to 70% in 1940. Based on the newly introduced
point system, all remaining original members of the division had more than enough points to qualify for discharge. At Zamboanga, the division began training for the amphibious landing that was planned to begin the
invasion of Japan, before news came in of the Japanese surrender on 15 August.
Occupation of Japan The division was transferred to X Corps and slated for the occupation of the
Kure and
Hiroshima area on western
Honshu, announced by MacArthur in a press conference on 10 September. The training program was accordingly modified to familiarize the soldiers of the division in Japanese customs and language, and combat units received training on military police duties. The 41st was ordered to conduct a "peaceful invasion" but to remain weary of Japanese treachery. The division embarked aboard transports at Zamboanga by 19 September and arrived in Japan in early October. The 162nd garrisoned the submarine base near the
Kure Naval Arsenal, finding that the barracks were "partially roofless and completely flea-ridden." While the barracks were being made habitable and cleansed with
DDT to kill fleas, many of the men lived in tents. After three weeks at Kure, the regiment was sent to
Onomichi,
Fukuyama (and
Matsue on 28 October to dispose of Japanese war materiel and conduct occupation duties. Company B of the 116th Engineers, the 181st
Bomb Disposal Squad, and the 58th Chemical General Service Company were attached to the 162nd to handle war materiel, and the regiment completed the relocation by 5 November with Cannon Company taking over military police duties. Regimental headquarters was established at Onomishi with the 1st Battalion at Matsue and 3rd Battalion at Fukuyama. The 58th Chemical Company was tasked with disposing of Japanese
gas supplies, while the rest of the regiment destroyed airplanes, signals equipment, artillery, ammunition and other Japanese war material. Many soldiers of the division took home Japanese small arms and other items as war souvenirs, and in the 162nd all of the recipients of the
Combat Infantryman Badge were given
scarves that had been intended for
kamikaze pilots. Meanwhile, morale deteriorated as the men focused on when they could be discharged and return home, resenting that soldiers who had spent the war in the continental United States were being discharged earlier than them. Based on the point system, the experienced combat veterans of the division gradually were sent home individually as fresh replacements arrived. After Thanksgiving, a surprisingly high number of new soldiers who had just arrived from the United States signed up in a reenlistment drive, having been promised Christmas leave at home, angering veterans who were pushed down the list for transportation as a result. By late December, the division transferred its remaining personnel to other units in Japan before officially being inactivated on 31 December. == Postwar ==