It currently serves as the Headquarters Battery for the British Army's Surveillance and Target Acquisition regiment.

The name Sanna's Post was taken following the actions of the battery in an engagement during the Second Boer War.

Q Battery, Royal Horse Artillery was originally raised in Poona, India on 1 March 1824 as 3rd Troop, Bombay Horse Artillery, part of the Bombay Presidency Army of the Honourable East India Company.

On 31 March 1900 the battery assisted the majority of General Broadwater's force from a Boer ambush at Koorn Spruit, near Sanna's Post.

During the First World War the battery saw continuous action on the western front.