Under the command of Captain Mercer, the battery was equipped with five 9 pounder cannons and a 5½" howitzer.

[3][4][a] Initially placed on the right, it was ordered to assist in repelling an attack by French cavalry at the centre of the allied line.

It beat off repeated charges by the French, disobeying previously issued orders from the Duke of Wellington that gunners were to abandon the guns and take refuge inside nearby infantry squares as the enemy closed.

[1] The troop was dispatched to India in 1858 to assist in the final operations to quell the Indian Rebellion of 1857.

[20][24] The brigade system was reintroduced on 1 March 1901, this time as tactical formations, and the battery was assigned to the XI Brigade-Division, RHA (redesignated as V Brigade, RHA on 1 October 1906) along with O Battery[25] and was stationed at Ambala.

[28] On 24 November 1914, G Battery was transferred to XV (later IV) Brigade, RHA in 3rd Cavalry Division.

The British and Canadian units remained in France[32] and most of them were transferred to the 3rd Cavalry Division causing it to be extensively reorganized.

[34] This was a short-lived arrangement: on 9 April, G and N Batteries left for V Army Brigade RHA.

[37] The battery took part in the Victory Parade in Paris in July 1919,[35] and returned to the United Kingdom (Aldershot) from Germany in October.

[46] After being evacuated at Dunkirk it joined Home Forces in the United Kingdom before being assigned to the 8th Support Group, 8th Armoured Division.

It arrived in Egypt on 18 July – the long sea journey being due to transiting via the Cape of Good Hope.

[53] Post-war, the battery remained part of the 5th RHA, equipped with Sexton 25 pounder self-propelled guns.

[57] Other than a period from 1977 to 1984 when the battery (and the regiment) was rerolled as a field artillery unit and posted to the BAOR in Germany, it has been based in England, initially at Aldershot but latterly at Colchester.

In August 2021, members of G Bty TAC Group (held at high readiness), deployed to Kabul in Afghanistan.

This was to aid in the extraction of British Nationals, following the rapid Taliban advance across the country and into the city.

Over 15,000 eligible Afghans and British Nationals successfully evacuated, in an operation that marked the end of the UK’s 20-year military campaign in Afghanistan.