Isaac Rapp Brush (November 7, 1889 – March 6, 1958) was a decorated officer in United States Army with the rank of Major General. Brush commanded the 40th Infantry Division from 1942 to 1945 during its World War II involvement in the United States armed forces' reconquest of the Philippines. Early career Isaac Rapp Brush was born on November 7, 1889 at Fort D.A. Russell, Wyoming as the son of Brigadier general Daniel H. Brush Jr. and Harriet Rapp. His family had wide military background while his father was a career Army officer and veteran of Civil War, Indian conflicts and also service in the Philippines during Spanish-American War and his paternal grandfather was a Union Army officer Daniel H. Brush Sr., who was brevetted Brigadier General, U.S. Volunteers on March 13, 1865 for "gallant and meritorious services at the Battles of Fort Donelson and Shiloh" during American Civil War. A maternal grandfather, Isaac Rapp was also a Civil war veteran who served for Union as Second Lieutenant with Company "D", 81st Illinois Infantry. His maternal uncle was his namesake Isaac Rapp, an architect who has been called the "Creator of the Santa Fe style." Brush's sister Harriet married late Brigadier general Clarence Deems Jr. Young Rapp grew up on the stations over the United States as his father changed assignments during his career, including the Philippines in the early 1900s, where his father was a Military District Commander of Lingayen Gulf. He returned to the United States and graduated from the Phillips Exeter Academy in Exeter, New Hampshire in summer 1908. Brush then entered the University of Illinois in Chicago, but left the college after he successfully passed the Officers' military examinations at Fort Leavenworth in February 1911. He was commissioned second lieutenant of Infantry on February 11, 1911 and ordered to Fort Sheridan for basic training. Brush completed the training few months later and embarked for the Philippines, where he joined Company "K", 8th Infantry Regiment at Pettit Barracks, Mindanao. He remained in that assignment for three years and took part in the Battle of Bud Bagsak under General John J. Pershing against Moro rebels on June 11–15, 1913. Following the return stateside in early January 1915, Brush joined the Company "H", 11th Infantry Regiment at Texas City, Texas. After three months with that outfit, he was transferred to the Company "C", 26th Infantry Regiment and took part