The 1st Bangalore Pioneers are a fictional regiment of the British Indian Army, mentioned in the Sherlock Holmes short story The Adventure of the Empty House by Sir Arthur Conan Doyle. The villain of the story, Colonel Sebastian Moran, formerly served with the regiment.
In the essay "Dr. Watson and the British Army", Crighton Sellars suggests that the regiment is inspired by the Pioneers of the Madras Sappers and Miners, who were based in close proximity to Bangalore and whose history during the relevant period includes the engagements in which Moran is said to have served.[1]