In 1879 the steamship ‘Havilah’ landed three 4.6 tonne, 68-pounder cannon as part of Wollongong Harbour defences against the threat of possible Russian attack. The cannon were designed to fire a shell weighing Шаблон:Convert up to 1.60 km. They lay unused by the harbour for 18 months without mountings and ammunition. They were finally placed as an inner defense battery by the local volunteer artillery group in 1880. Endeavour Drive now covers the original position.
However, by the mid-1880s it became obvious that enemy cruisers could bombard the port out of range of these obsolete guns.
In 1890 a larger and more modern 6-inch gun was positioned in a concrete pit near the summit of Flagstaff Hill. Underground rooms protected the ammunition and the gunners. By 1893 further fortifications were completed on Smith's Hill west of Harbour.
Constructed between 1890 and 1891, the fort was built with a disappearing gun emplacement. The fort was dug-out of the hill using face brick walls and then earth was placed over the tunnels. The gun was commissioned and first fired in 1892. The gun emplacement was provided with two range finder positions.
