The 15th Field Artillery (FA) Regiment was organized in Syracuse, New York on 1 June 1917 from cadre transferred from the 4th FA Regiment. Assignment to the 2nd Infantry Division followed on 21 September 1917, and training took place at Pine Camp, New York. The Regiment left the United States on 11 December 1917 and sailed onboard the SS Adriatic for Liverpool, England. http://www.landscaper.net/worldwar1.htm