A great many towns and cities across the United Kingdom have a proud military history. Pembroke Dock, although only a small town is one such town – its garrison grew to become the seventh largest in the United Kingdom. The garrison's foundation was laid when a Royal Dockyard was established in 1814. Two companies of Royal Marine Light Infantry, one from Chatham the other from Portsmouth, arrived on orders of the Naval Department to guard it. The first Line regiment, the 14th Foot, did not arrive until the 1840s, quickly followed by others who not only assisted in guarding the dockyard but also in furthering their foot drill and musketry skills, At first they were all billeted under canvas on St. Patrick's Hill, which overlooked the dockyard. By December 1845 Treowen Barracks, which could house 400 men, was completed. As troop concentration increased, so the need for more permanent camps became paramount. The first of these was constructed to the east of town, and this area is still known today as Bush Camp. By the outbreak of the Crimean War in 1854 this camp had become more permanent with the construction of sufficient wooden huts to house 1000 men or one battalion, but even this proved inadequate. A further camp was therefore ordered. Built in 1855, this was also constructed of wood and was sited at the base of Llanion Hill, which stands just north of the town above Hobbs Point, again it was of and sufficient in size to house 1000 men. The engineer appointed to this task was Colonel Crawley of the Royal Engineers, whose own men lived under canvas at East Pennar Point, which stands to the south west of town. Pembroke Dock was now walled in on three sides by military camps, while the Cleddau River formed the fourth and strongest wall with many forts and blockhouses spread along its banks to the sea some seven miles away, all this combined to create an almost impregnable fortress.The garrison continued to expand as troops arrived from the length and breadth of the Kingdom, at such a pace that eventually the camps were overflowing. This resulted in disease breaking out among the troops, due to the squalid conditions. The conditions became so intolerable that the sick were transported to Freshwater East where they lived under canvas for a week or two, so enabling them to breathe fresh air once more. By the turn of the century the Royal Engineers' Barracks at East Pennar Point was constructed of brick. At the same time plans were drawn to construct an even larger barracks to take the place of the ageing wooden camps at Bush and Llanion. These barracks were to be of red brick. It is said their design was taken from those built in India - whether this is fact or fiction is of little consequence. It opened in 1904 and the buildings, which dominated the highest hill in town, certainly stood out as the most modern of their time. Between 1947 and 1960 the military was reduced in size. This led to Bush Camp being dismantled, while the Royal Engineers' Barracks at East Pennar Point was abandoned. Today all that remains of our glorious past is Treowen Barracks, now renamed The Defensible Barracks on St. Patrick's Hill, where it is virtually surrounded by new buildings and a golf course - the trappings of a modern town. On the north side, Llanion Hill is still dominated by the remains of Llanion Barracks, but the barrack blocks and Guard Room have now been converted to flats while the N.A.A.F.I. now houses the Department of Social Security. Pembroke Dock will never forget its past, as today many of its streets bear the names of the regiments and the founding fathers, which during the short history of the town made it what it is today.
Those regiments are listed in the following sections. Italics following a regiment's name give that unit's nickname pdf.