posted to Fort Wadsworth, New York with the 1st Artillery from August 1893 to January 1895. Chamberlain was instructor of military science and tactics at Peekskill Military Academy in Peekskill, New York from January 1895 to July 1896. He was then assigned to Battery D, 1st Artillery and served at Fort Sheridan, Illinois and Washington Barracks, District of Columbia from October 1896 to July 1897. Chamberlain served as U.S. military attaché in Vienna, Austria from August 1897 to May 1898. Continued career During the Spanish–American War, Chamberlain returned to the United States and performed recruiting in New York City from June to July 1898. In July, he was promoted to temporary major and assigned as adjutant and ordnance officer for the Siege Artillery Train organized in Tampa, Florida and intended for service in Cuba. In August, he was assigned as chief ordnance officer of 1st Division, Seventh Army Corps, in addition to performing duty as the corps' chief mustering officer from August to October 1898. He was assigned as division adjutant in September, and served until the end of October. Chamberlain became ill during the autumn of 1898, and recuperated while on sick leave from October 1898 to February 1899. In March 1899, Chamberlain was promoted to permanent captain in the 1st Artillery and assigned as adjutant of the 1st Artillery. He served in this post until November 1900, when he was promoted to permanent major and assigned to Inspector General duties in the Washington, D.C. Office of the Inspector General. He was promoted to lieutenant colonel in March 1901, and in April was appointed inspector general of the Department of California. In December 1902, he was assigned to Philippine–American War duty as inspector general of the Department of Mindanao. From June 1903 to January 1905, Chamberlain was inspector general of the Philippine Division, and he was promoted to colonel in November 1904. Chamberlain served in the Office of the Inspector General from April 1905 to December 1906. He was assigned as inspector general of the Pacific Division from December 1906 to June 1907. From August 1907 to July 1909, he served as inspector general of the Department of the East. From September 1909 to August 1911, he served again as inspector general of the Philippines Division. He was inspector general of the Western Department from September 1911 to August 1912. From January to March 1912, Chamberlain attended a special