Madras Engineer Group (MEG), informally known as the Madras Sappers, is an engineer group of the Corps of Engineers of the Indian Army. The Madras Sappers draw their origin from the erstwhile Madras Presidency army of the British Raj. This regiment has its HQ in Bengaluru. The Madras Sappers are the oldest of the three groups of the Corps of Engineers. The Bangalore torpedo, a mine clearing explosive device, was invented in the Centre at Bengaluru in the early years of the Twentieth Century.