In the Colonies and former Boer Republics which became the Union of South Africa in 1910, several unofficial military decorations and medals were instituted and awarded during the nineteenth and early twentieth century. Sir Harry Smith's Medal for Gallantry is an unofficial military decoration for bravery, awarded for actions following the siege of Fort Cox in December 1850, at the beginning of the 8th Cape Frontier War. The medal was privately instituted in 1851 by Major General Sir Henry George Wakelyn Smith Bt GCB, at the time the Governor and Commander-in-Chief of the Cape of Good Hope.

Lieutenant-General Sir Henry George Wakelyn Smith, 1st Baronet, GCB was a notable English soldier and military commander in the British Army of the early 19th century. A veteran of the Napoleonic Wars, he is also particularly remembered for his role in the Battle of Aliwal, India in 1846, his subsequent governorship of the Cape Colony, and as the husband of Lady Smith.