Its lineage is maintained by 224 (Pembroke Yeomanry) Transport Squadron, part of 157 (Welsh) Regiment RLC in the Army Reserve.

After Britain was drawn into the French Revolutionary Wars, Prime Minister William Pitt the Younger proposed on 14 March 1794 that the counties should form a force of Volunteer Yeoman Cavalry (Yeomanry) that could be called on by the King to defend the nation against invasion or by the Lord Lieutenant to subdue any civil disorder within the county.

[4][5][6][7] In February 1797 a French Republican fleet and landing force was spotted off the West of England and the coast defences were alerted.

Unable to enter the Bristol Channel because of adverse winds, the French made for Cardigan Bay, appearing off Fishguard in Pembrokeshire on the afternoon of 22 February.

A warning shot from the fort showed that the harbour was defended, so the French landed in the evening at Carregwastad Point, 2.5 miles (4.0 km) to the west.

The landing force under Chef de brigade William Tate consisted of the Légion Noire, around 1300 strong, around half of them recruited from French convicts and foreign prisoners-of-war.

At dawn on 23 February the French ships left, while the Legion posted an advance guard and patrols in the Carn Wnda hills and completed the unloading of stores on Goodwick Sands.

Cawdor then force-marched the whole group towards Fishguard, which was still unoccupied by the enemy when he arrived at 17.00 and set up his headquarters at the Royal Oak Inn.

The Legion's outposts reported an enemy force approaching, its numbers inflated by the numerous onlookers on the surrounding hills, some armed with pitchforks, and including some hundreds of Welsh women in their traditional red shawls and tall black hats, whose appearance at a distance resembled redcoated infantry.

[5] Although the militia and remaining infantry volunteers were stood down at the end of the Napoleonic Wars, the yeomanry was kept in being because of its usefulness for internal security.

From 26 June to 18 November 1843 the regiment was on continuous service (by alternate troops), a total of 171 days in support of the civil powers in the year.

[11] Major-Commandant Bowling was succeeded by Captain Henry Leach of Corston House, a former officer in the Scots Fusilier Guards, who was promoted on 12 June 1852.

[11][16] Major Leach died in 1864 and Capt Baron de Rutzen, of Slebech Hall who had been first commissioned as a cornet in the regiment on 29 May 1847, was promoted to succeed him on 20 May 1864.

The Pembroke Yeomanry raised a fourth 'Dungleddy and North-East Troop', and the regiment was upgraded to a lieutenant-colonel's command: Maj Baron de Rutzen was promoted on 21 February 1871.

[17][22] As a largely rural county the population of Pembrokeshire was too small to support a full regiment, and the Pembroke Yeomanry was now recruiting outside its borders in Carmarthenshire and Cardiganshire.

[5][6] Following a string of defeats during Black Week in early December 1899, the British government realised that it would need more troops than just the regular army to fight the Second Boer War.

[2][24][25][26][27] The Pembroke Yeomanry raised the 30th (Pembrokeshire) Company, which landed in South Africa on 6 April and served in 9th (Welsh) Battalion, IY.

[49][e] When war was declared on 4 August 1914, the Pembroke Yeomanry mobilised at its drill halls under Lt-Col Owen Williams, TD, who had been in command since 1 October 1912.

On 15 August the War Office issued instructions to separate those men who had signed up for Home Service only, and form these into reserve units.

Partial mechanisation was carried out from 1927, but the guns retained iron-tyred wheels until pneumatic tyres began to be introduced just before World War II.

[86][87] On 1 December 1941 38th (W) Division was placed on a lower establishment; this meant that it was not going to be sent overseas for the foreseeable future, and it became a static coast defence formation.

As the invasion threat receded, the lower establishment divisions became sources of units and drafts to reinforce the fighting formations overseas.

[7][5][6][77][75][90] It landed in Italy to join Eighth Army in December 1943 and fought in the Italian Campaign, including the battles round Monte Cassino and the breaching of the Gothic Line (Operation Olive).

[79][83] After it left 38th (W) Division the regiment was sent by sea to reinforce Eighth Army fighting the Western Desert Campaign; it landed at Suez in September 1942.

7th Armoured Division pursued the enemy the Enfidaville position and then switched to First Army for the final push to capture Tunis (Operations Vulcan and Strike) in May 1943.

In October it was engaged in clearing the Venlo 'Pocket', culminating in December when 8th AGRA supported 15th (S) Division once more for Operation Guildford to take the last German bridgehead on the River Maas at Blerick.

[107] In the TF the parade and walking out uniform of the Pembroke Yeomanry consisted of a dark blue peaked cap, tunic and overalls.

[108] The plain khaki service dress of the regular cavalry was worn from 1908 onwards, replacing the blue uniform for all occasions after 1914.

[109] When the regiment was first converted to artillery it continued to wear its Pembroke Yeomanry cap badge, consisting of the Prince of Wales's feathers, coronet and 'Ich Dien' motto, with a scroll beneath carrying the unique Battle honour 'Fishguard'.

The Royal Artillery does not receive battle honours (its motto, Ubique ('Everywhere') granted by William IV in 1833 is deemed to cover all engagements),[111] so none were awarded for World War II.