In late May and early June 1942, during World War II, Imperial Japanese Navy submarines made a series of attacks on the Australian cities of Sydney and Newcastle. Visit Australian War Memorial – https://www.awm.gov.au/visit Royal Australian Navy Naval Heritage Centre – https://www.navy.gov.au/ran-heritage-centre Fort Scratchley – https://www.newcastle.nsw.gov.au/fort-scratchley/fort-scratchley-home More information Navy – https://www.navy.gov.au/history/feature-histories/japanese-midget-submarine-attack-sydney-harbour Sea Museum – https://www.sea.museum/2017/06/14/midget-submarine-attack-on-sydney-31-may-1-june-1942 …