As an officer of the British Indian Army Geoffrey Bruce took part in the Third Anglo-Afghan War of 1919, and North-West Frontier Province expeditions between 1920 and 1923 and later between 1937 and 1938.
As an officer of the British Indian Army Geoffrey Bruce took part in the Third Anglo-Afghan War of 1919 and in 1921 he was awarded the Military Cross. He participated in the North-West Frontier Province expeditions between 1920 and 1923 and later between 1937 and 1938.