Lieutenant-General Sir William Augustus Fyers KCB (2 July 1815 – 10 November 1895) was a British Army officer who served as colonel of the Durham Light Infantry.

He was educated at the Military College Edinburgh.

[3] Fyers was commissioned as an ensign in the 4th Regiment of Foot on 17 October 1834.

[4] He was sent to Sindh with the 40th Regiment of Foot in 1839 and took part in the capture of Karachi and then saw action in the First Anglo-Afghan War.

[5] He served with the 97th Regiment of Foot during the Crimean War[6] and then commanded a battalion at the Siege of Cawnpore in June 1857 and at the Siege of Lucknow in Autumn 1857 during the Indian Rebellion.