The Colonial Auxiliary Forces Long Service Medal was instituted by Queen Victoria in 1899 as a military long service award for part-time members of all ranks in any of the organized military forces of the British Colonies, Dependencies and Protectorates throughout the British Empire.

[5][6] The Colonial Auxiliary Forces Long Service Medal was instituted by Queen Victoria's Royal Warrant of 18 May 1899.

This medal could be awarded to part-time members of all ranks in recognition of long service in any of the organised military forces of the Dominion of Canada, the Crown Colonies and the Protectorates, whether designated as militia or volunteers or otherwise.

[2][7][8] The medal could be awarded for twenty years of service as a part-time member of any rank in any of the Colonial Auxiliary Forces.

[9] In the order of wear prescribed by the British Central Chancery of the Orders of Knighthood, the Colonial Auxiliary Forces Long Service Medal takes precedence after the Colonial Auxiliary Forces Officers' Decoration and before the Medal for Good Shooting (Naval).

[7][8] The reverse shows an ornamental shield bearing the legend "FOR LONG SERVICE IN THE COLONIAL AUXILIARY FORCES" in five lines.