Edmund Costello - Later Service

Later Service

In November 1900 Costello was appointed adjutant of his regiment and in 1901 he was promoted Captain. He then worked as a recruiting officer for several years before taking part in the Mohmand operations of 1908. He was promoted Major in 1910. In 1913 he entered the Indian Staff College at Quetta and graduated just before the outbreak of the First World War in 1914, when he rejoined his regiment as second-in-command.

The regiment was soon sent to Mesopotamia as part of the 17th Indian Infantry Brigade of the 6th Indian Division and Costello remained there for the rest of the war. He was promoted Brevet Lieutenant-Colonel in June 1916, was awarded the Distinguished Service Order (DSO) in 1917 and appointed Companion of the Order of St Michael and St George (CMG) in 1918. In May 1918 he took command of the 12th Indian Infantry Brigade and he received a substantive promotion to Lieutenant-Colonel in September 1918. He was mentioned five times in dispatches during the war and also received the French Croix de Guerre.

In June 1919 he was promoted Brevet Colonel and was joint commander of the Indian contingent at the Peace March in London, for which he was appointed Commander of the Royal Victorian Order (CVO) in the 1920 New Year Honours. He was promoted substantive Colonel in March 1920, although he had held the acting appointment of Brigadier-General since 1918. From May to December 1920 he commanded the 8th Indian Infantry Brigade in the 3rd (Lahore) Division. In March 1921 he went to Palestine as temporary commander of the Palestine Defence Force and remained there to command a brigade in 1922. He retired in October 1923 and became Director of Military Studies at the University of Cambridge.