Educated at Eton College and the Royal Military Academy, Woolwich, Pree was commissioned as a Second lieutenant in the Royal Artillery in July 1890. He was promoted to Lieutenant on 25 July 1893, and served on the North West Frontier of India in 1897. Promotion to Captain followed on 3 February 1900, and after the outbreak of the Second Boer War in South Africa he volunteered for service with the Imperial Yeomanry.
He served originally with the 17th Battalion, but was on 3 May 1903 appointed Second in Command of the 7th Battalion, with the temporary rank of Major.
He later served in the First World War. He was appointed Commander of the 13th Indian Infantry Brigade in 1920, General Officer Commanding 55th (West Lancashire) Infantry Division in 1925 and Commandant of the Royal Military Academy, Woolwich in 1926 before retiring in 1931.
There is a memorial to Pree at All Saints" Church, Beckley.