sentences:  The first steps towards developing a defence manufacturing industry in Australia came in 1845, however, when 5.5-inch mortar shells went into production in Sydney to meet the demand for high trajectory fire support for British infantry attacks on Maori forts in New Zealand.With the outbreak of the Crimean War in 1854, however, a local voluntary force consisting of one troop of cavalry, one battery of artillery, and a battalion of infantry was raised.The infantry force, consisting of six companies, was known as the Volunteer Sydney Rifle Corps.