Lucius Roy Holbrook (April 30, 1875 – October 19, 1952) was a major general who commanded the United States Army's Philippine Department from 1936 to 1938.

Holbrook's mother, Mary Ames, was born November 19, 1840, at West Bridgewater, Massachusetts, and died on July 12, 1889.

[1] On June 24, 1889, Holbrook was posted to the Philippine Islands and during the Philippine–American War, he participated in the Northern Campaign, fighting in battles at Arayat, Cabiao, San Isidro, Santa Rosa, and Talavera.

He then served with General Theodore Schwan's Southern Expedition from January 3 to February 18, 1900, and was at the Battles of Muntinlupa and Biñan, Carmona and Silan, Tiaong, Candaleria and Tayabas.

Promoted to first lieutenant on January 23, 1900, later in the year he was posted to Troop H, 6th Cavalry Regiment, which was stationed at Boise Barracks in Idaho, until February 11, 1901.

Holbrook was assigned to the Commissary Department where he commanded the first training school for army bakers and cooks until March 9, 1911.

These works include: Holbrook then served as Assistant to the Chief Commissary, Maneuver Division, San Antonio, Texas, until July 21, 1911, and at Fort Riley until September 20, 1911.

He was then ordered to Paris, France, where he attended the Ecole de L'Intendance (the French Army School of Supply) until December 15, 1912.

Holbrook then served at Fort Sam Houston, Texas, until March 7, 1917, where he was in command of the 7th Field Artillery Regiment of the 1st Division, and he sailed with it for France on July 31, 1917, almost four months after the American entry into World War I.

His careful judgment and high military attainments where shown in the accuracy and timeliness of the fire from the batteries under his direction, which despite the difficulties involved, contributed materially to the success of the operation.In action against insurgent forces near Tayabas, Philippine Islands, on January 21, 1900The Holbrook's children: Major General Lucius R. Holbrook died on October 19, 1952, at Letterman Army Hospital.