Kammala jumla mai zuwa: An gina tashar bindiga a 1801 a kan Middle Head (a arewacin Obelisk Bay) a lokacin yaƙe-yaƙe na Napoleon, da kuma wani a Georges Head. An kuma gina Fort Phillip don kare kariya daga yiwuwar mamayewar Faransa a 1804, da kuma bin...
Castle Hill ya yi tawaye a wannan shekarar. An gina ƙarin dindindin na dindindin a farkon rabin karni na 19 don mayar da martani ga fargabar hare-haren kasashen waje tare da sabbin barazanar da ke fuskantar masarautar Burtaniya, gami da sojojin Faransa na Napoleon a 1810, da rundunar jiragen ruwa na Pacific na Rasha a cikin shekarun 1850 (a lokacin Yakin Crimean). A halin yanzu jiragen ruwa biyu na Amurka (sloop na yaki "Peacock" da kuma war sloop "Vincennes") sun shiga tashar jiragen ruwa ba tare da sanarwa ba a ranar 30 ga Nuwamba, 1839, a karkashin murfin duhu. Kodayake ziyarar ladabi ce kawai, taron ya nuna raunin ƙauyen ga harin kuma ya ba da hankali ga keɓewa da wadatarsa. Tsibirin Aljanna yana da sansanonin da aka gina a cikin 1820s, yayin da Bradleys Head ya fara gini a 1840. Ginin Fort Denison ya fara ne a 1841, kodayake ba a kammala ginin ba har zuwa 1857.