The 1915 Singapore Mutiny, also known as the 1915 Sepoy Mutiny, or Mutiny of the 5th Native Light Infantry was a mutiny involving up to half of 850 sepoys (Indian soldiers) against the British in Singapore during the First World War, linked with the 1915 Ghadar Conspiracy. The mutiny, on 15 February 1915, lasted nearly seven days and resulted in the deaths of 47 British soldiers and local civilians, before it was finally quelled by British forces and Allied naval detachments. It was an event that not only caught the British off-guard but also shook the foundation of British rule in Singapore. More than 200 sepoys were tried by court-martial, and 47 were executed.