Sydney Harbour defences

http://dbpedia.org/resource/Sydney_Harbour_defences an entity of type: WikicatBuildingsAndStructuresInSydney

Sydney Harbour was protected by coastal batteries and other fixed defences from the early 19th century until the 1960s. These defences were constructed to protect the Australian city of Sydney from attack by enemy warships and submarines. rdf:langString
rdf:langString Sydney Harbour defences
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rdf:langString Sydney Harbour was protected by coastal batteries and other fixed defences from the early 19th century until the 1960s. These defences were constructed to protect the Australian city of Sydney from attack by enemy warships and submarines.
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