The regimental headquarters, band, and First Battalion arrived in San Francisco on 16 July 1900. They immediately boarded the Transport
Sumner and sailed for
Nagasaki, Japan on 17 July. Later in July, Companies I, K, and L left their stations for San Francisco and went into camp at the Presidio. M Company also came from Fort McPherson at the same time. The First Battalion arrived at Nagasaki on 10 August. There they transferred to the Transport
Indiana, and sailed for
Tientsin via Taku on 13 August. The battalion arrived off of the Taku forts (already captured by the allies) on 16 August. During the latter part of the month, the Battalion reconnoitered and skirmished continuously over the same terrain where the 9th Infantry had lost 100 men killed in action (including their regimental commander, Colonel Liscum). Despite the fact that the Boxers had been dispersed several months before, numerous small bands of them were still operating in the country. About 1 September, Companies A, B, and D were assigned the duty of escorting junks carrying supplies up the Pei Ho River to Peking. After completing this mission, Company C took station at Tientsin Arsenal on 6 September, while A Company occupied Tongku on 22 September. Through the latter part of November the battalion was engaged in almost daily expeditions against small bands of Boxers in nearby villages. On 25 November the First Battalion was relieved from duty with the China Relief Expedition and on 28 November arrived at Tongku. There it boarded the Transport
Rosecrans and arrived at Nagasaki on 4 December, then continuing on to Manila, arriving on 13 December. After lying at anchor in Manila Bay for eight days, the regiment sailed for Legaspi in the Province of Albay. On 24 December, Headquarters, the Band, and C and D Companies disembarked and took station at Legaspi. The transport continued to Tobacco, Albay, where B Company disembarked. Company A continued on to arrive at Mauban on 29 December. From then until 7 November 1901, the company conducted patrols to track the movement of the insurgent General Cailles. On 7 November, A Company moved to Bulan, Sorsogon and remained there until 28 December. It then moved on to the town of Sorsogon, in Sorsogon Province. It departed there on 5 March 1902 and arrived at Santa Elena, Samar on 11 March. Company B remained at Tobacco until 30 July 1901, conducting patrols throughout that period. On 30 July B Company proceeded to the Island of Catanduanes. After five months of heavy scout work the company left for San Jose de Lagamoy, where it was engaged in tracking down bands of headhunters. On 31 July 1902 B Company returned to the regiment. C Company remained at Legaspi until 28 January 1902, when it left for the Island of Catanduanes. During the period 18 April to 31 July the company successively garrisoned Tabaco, Gubat, Santa Rita, Tones Island, Quentigean Island, and Balangigo. On 31 July it proceeded to Catbalogan and joined the regiment which was preparing to return to the United States. D Company remained on duty at Legaspi. Between 14 April and 31 July 1902 the company occupied Nueva Cacera (now Naga), Sorsogon, Bulan, and Point Binatao. On 31 July it left for the regimental assembly point at Catbalogan. By April 1902, the balance of the regiment joined the 3rd Battalion in the Philippines and saw considerable action against the insurgents. The 2nd Battalion, which had remained in New York, did not appear in the Philippines until February 1902, just in time to turn around and return with its outfit in September to the United States. In September 1902 the regiment sailed for
Monterey, California, where it built the current
Presidio. The next three years were uneventful. The unit placing seven men on the team of ten men from the Pacific Division in the Army's annual rifle competition in 1905. In November 1905, the regiment was posted to Mindanao in the Philippines. When the 15th returned to the U.S. in 1907, it was assigned to
Fort Douglas, Utah. After 1907 the next change of station did not come for four years, but when it did come the 15th Infantry left the United States for twenty-six years. Before this removal, the regiment's entrants won first, second and fourth honors in the individual competition, and five of its six contestants made the ten-man Army Rifle Team. The enlistments of 500 men had expired during 1908, and green recruits had filled the regiment at its home station in Utah and took part in a banquet given in their honor by the officers. The companies in the Philippines included F, G, and H at Camp Eldridge and Co. E at
Camp John Hay. The detachments in P.I. never joined the rest, for the men were transferred from it to the 1st Battalion of the 31st Infantry in August 1916. Company L operated from
Tongshan and M was at
Kuyeh, China during this time. The 2nd Battalion was reorganized in Tientsin by transfer of personnel from the other two battalions. The mission of the regiment became difficult to define, and in the course of time the unit itself was transferred to the control of the State Department. == World War II, Korea and Cold War ==