Fort Glanville Conservation Park is a protected area located in the Australian state of South Australia located in Semaphore Park, a seaside suburb of Adelaide consisting of a functional 19th century fort listed on the South Australian Heritage Register and some adjoining land used as a caravan park. The fort was built after more than 40 years of indecision over the defence of South Australia. It was the first colonial fortification in the state and is the best preserved and most functional in Australia. Fort Glanville was designed by Governor Major General Sir William Jervois and Lieutenant Colonel Peter Scratchley, both important figures in early Australian colonial defence. When built it was designed to defend both Semaphore's anchorage and shipping entering the Port River from naval attack.
Construction of the fort began in 1878. It was officially opened in October 1880 and completed by 1882. Due to changes in the Port River and shipping movements, Fort Largs surpassed it for strategic importance in 1890. By the close of the 19th century, the fort was largely unused and had no defence significance. It was briefly used for military purposes during World War I and World War II, though not for its original defensive role. For much of the 20th century the area was put to a variety of uses including accommodation, a caravan park and a boy scout campsite. After coming into state government hands in 1951 it was declared as a conservation park and is now managed by the Department for Environment and Water (DEW), preserving and showcasing its historic value. The fort and surrounds occupy the northern half of the conservation park, the southern half is a caravan park. The fort is a lunette shaped defensible battery that was supported by land forces for self-defence. When constructed it was seen as state of the art, incorporating powerful and modern weapons. Its main armament is two rifled muzzle-loading (RML) 10 inch 20 ton guns, backed up by two RML 64 pounder 64 cwt guns, both rare in their particular configuration. The fort retains its original 19th century cannons, and three have been restored to working condition.
Fort Glanville Historical Association operates the park under license and conducts open days in the park, recreating the past operation of the fort including military drill and the firing of period weapons. The Association, park service, other volunteers and various grants have all helped ensure the fort is presented in close to original condition. It is the most complete 19th Century fort in Australia, and one of very few in the world that remains in original condition. Connecting the fort to Semaphore jetty is the "Semaphore and Fort Glanville Tourist Railway", a gauge passenger steam train operated by volunteers from the National Railway Museum.
Historic background.
In the early years of colonial South Australia, the colonists saw themselves as part of the British Empire and external defence as an Imperial responsibility. Communication lines were long and the empire's wars remote. Great Britain had undisputed military predominance and she was expected by all to protect her colonies, even one as distant. For local defence, Governor Gawler raised the first military force in 1840, composed solely of volunteers and known as the South Australian Volunteer Militia Brigade. It was granted the "Royal" title in 1841 but the brigade had all but ceased to exist a year later. The colony obtained its first artillery in 1847 with the arrival of six field guns of various types.
Tensions between Britain and the Russian Empire in the 1850s, as starkly demonstrated by the Crimean War, along with Australia-wide moves towards self-government caused a reassessment of the colony's defence posture. The various colonies regarded themselves as possible targets for the Russian Pacific Fleet, then based in Siberia. In 1854, Governor Henry Young appointed a commission under Boyle Travers Finniss to report on the defence of the colony, in case of war. Boyle's report recommended leaving strategic defence in the hands of the Imperial Navy, though South Australia was to purchase a 400-ton naval vessel. Local defence was to be largely handled by the existing small Imperial garrison and local colonial force, supported by the artillery obtained in 1847. 
When the Crimean War ended in 1856, the danger passed and the perceived need for expensive defence preparations with it. For many years nothing substantive came about from debate on defence of the colony. Over time there formed a consensus favouring Semaphore for fixed defences or fortification; a strategy also argued by the government established Hart Commission in 1858. Raiders were seen as unlikely to force the shallows of the Port River but instead were expected to stand off Semaphore, shell the port and use their guns to support landings. The Hart Report recommended building of martello towers at Semaphore and Glenelg, the first report to recommend permanent fortification at Semaphore, though none were built mainly due to the cost.
The volunteer military force was revived in 1859, with new and modern arms for the infantry, cavalry and artillery. Though there was a few years of enthusiasm and a restructuring in 1866, by 1870 the force was virtually disbanded. In that year also, British troops were withdrawn from the other Australian colonies; none were by then stationed in South Australia. With no definitive defence policy, in 1864 the government had sought advice from Captain Parkin of HMS Falcon and Commodore Sir William Wiseman commander of the Australian station; both visiting British naval officers. They both recommended fixed fortifications for the coast supported by gunboats. Sir Wiseman's report particularly recommended construction of forts at Semaphore, Port Creek's entrance and one midway between. 
In 1864, a story circulated, supported by press speculation, that there was a danger of the Russian fleet attacking Melbourne should Russia and Britain find themselves at war. The "South Australian Register" produced an editorial decrying the states lack of defences. Within days £20,000 (A$4.14 million in 2005) was provided by the government for defence, an amount then seen as insufficient for significant preparation. The danger passed without any lasting defence action except the government's in-principle adoption of Sir Wiseman's recommendations. To curtail costs only the Semaphore fort was to be built initially, as it was considered the most critical. Site preparation begun and two guns were purchased, but escalating cost estimates caused the plan to be abandoned by 1868.
During the early 1870s South Australia's defence was solely dependent on the volunteer military, and a few artillery pieces purchased during earlier war scares. British troops had been withdrawn from the Australian colonies in 1870, leaving the state dependent on its own military resources. In a report to the government in 1866, Colonel Freeling and Major Peter Scratchley recommended establishment of a permanent military force. In 1876 the South Australian government, along with those from New South Wales, Victoria and Queensland requested from the War Office that Major General Sir William Jervois, a noted coastal fortification expert, be appointed to advise on defence needs. He arrived in Sydney in mid-1877 with then Lieutenant Colonel Scratchley. 
The 1877 report, delivered after he became South Australian Governor, called for three batteries, at Largs Bay, Semaphore and Glenelg, connected by a military road and supported by field gun emplacements, naval elements and mobile forces. He determined that South Australia's most probable defence risk was an attack by up to two ships rather than a larger force, and this formed the basis of the final fortification design. His report called for Military Road to be extended to Marino, an electro-contact torpedo station be established on Torrens Island and that a gun boat be provided. In November 1878 the government passed the "Military Forces Act", which provided for the raising of a permanent military force and reserve. Two volunteer reserve rifle companies were formed in 1878 and a permanent artillery unit in 1882.
At this time Semaphore, with its jetty built in 1860, was the state's main entry point for passengers and mail. It had a signal station (built 1872) and a time ball tower (built 1875). Semaphore remained of great maritime significance for the state until the 1880s. When the decision was made to build the fort, in 1878, the state's population had reached approximately 250,000. Settlement extended beyond Port Augusta, though Adelaide remained the dominant feature in the economy partly due to the layout of the rail network. At this point Adelaide had a population of over 30,000. Port Adelaide was the main port for South Australia, with over 1,000 ships visiting each year, and a local population of over 2,500.
Foundation.
Scratchley had inspected the proposed South Australian fort sites, and Jervois and Scratchley were both responsible for the final fort design and location. The first fort was erected to guard both the entrance to Port Adelaide and the anchorage at Semaphore. It was built on sandhills near Glanville Hall at Semaphore, on a promontory called "Point Malcom"—a name that is now used for an adjacent reserve. The site was chosen so as to best guard shipping sailing to both the Port River and the Outer Harbour; and a second northern fort was to protect the entrance to Port River itself. At the time of its construction it was seen as a defence against foreign threats, mainly Russian. 
Scratchley offered to design the battery. The offer was accepted by Cabinet in January 1878, and he was primarily responsible for the design of both Fort Glanville and Fort Largs. The plans were drawn by Alexander Bain Moncrieff of the South Australian Engineer-in-Chief's Department, supervised by Scratchley in his Melbourne headquarters. Moncrieff, at Scratchley's suggestion, was later to supervise the fort's construction. Plans for both batteries were completed in June 1878, tenders called for in July and the contract for Fort Glanville awarded in August to John Robb of Kapunda, South Australia for the sum of £15,893 12s 7d.
Construction began in 1878 and though completed by 1882 the fort was operational in 1880. Changes were made to the design during construction. Some forced by armament changes and others made to ensure additional security, including a rear-defence wall and connecting road from Military Road. By January 1880 two guns were in place and the fort opened later the same year with an extensive opening ceremony on 2 October. In addition to parades, a small target was moored offshore and fired on by all guns. A total of sixteen shots was fired during which one of the ten inch guns proved faulty. Only one ranging shot was fired and the shots were estimated to land from on-target to 350 yards short. The fort's final cost was approximately £36,000 (A$7.05 million in 2005) consisting of £23,600 for physical structures and the remainder for armament and fittings. At the time of its construction it was at the forefront of such fortification design, and was considered state of the art.
When first conceived, it was known as the Semaphore Battery, later changed to South Battery and then Fort Glanville by the opening ceremony. The name Glanville came from nearby Glanville Hall, residence of John Hart (1809–1873) thrice Premier of South Australia. Hart had named the house after his mother's maiden name (Mary Glanville).
Personnel.
For the eighteen months after its opening, the fort was manned by B company of the South Australian Volunteer Artillery but only on weekends. This changed in mid-1882 when South Australia's first permanent military force was formed. The fort became the headquarters for the South Australian Permanent Military Force, then the state's entire standing army of one officer and eighteen other ranks. Some of the unit was stationed at nearby Fort Largs from 1886; and, by 1889 the unit had grown to one officer and 45 other ranks. This force grew to 53 of all ranks by 1892 and was by then known as the Permanent Artillery. The unit trained 27 more non-commissioned officers and men who were sent to man the King George Sound batteries near Albany, Western Australia. Though some of the gunners served in the Second Boer War, the unit itself never saw action. Fort Glanville's section was called out in 1890, marching to assist the police with a waterside worker's strike in Port Adelaide. In this case no shots were fired and the strikers did not confront the police or troops. Additional defence acts were passed in 1886, 1890 and 1895 but, until defence passed into federal hands after 1901,