In 1900, he was on the China Relief Expedition, became a captain, and was sent to the Philippines. Upon his return to the United States, Berry commanded the 21st Battery Field Artillery at Fort Sheridan, Illinois. He was then sent to the School of Fire at Fort Sill, Oklahoma, and in 1907 was promoted to major.
On August 5, 1917, Berry was promoted to brigadier general and commanded the 60th Field Artillery Brigade in Oklahoma. In May 1918, he took this brigade to France and joined the 35th Division in the Vosges Mountains. He was the 35th Division's Chief of Artillery and also supported the First Infantry Division in battle. He returned to the States in April 1919, and on June 5 reverted to his permanent rank of colonel. He commanded the 78th Field Artillery Brigade and later the Sixth Field Artillery Brigade until his retirement on June 19, 1921. While retired, he was promoted to brigadier general in 1930.[3]
^ ab"Lucien G. Berry". Seventy-First Annual Report of the Association of Graduates of the United States Military Academy at West Point, New York. Newburgh, New York: The Moore Printing Company, Inc. June 10, 1940. pp. 158–161. Retrieved 2023-05-01.