Florence Nightingale's most famous contribution came during the Crimean War, which became her central focus when reports got back to Britain about the horrific conditions for the wounded. On 21 October 1854, she and the staff of 38 women volunteer nurses that she trained, including her aunt Mai Smith,[8] and fifteen Catholic nuns (mobilised by Henry Edward Manning)[9] were sent (under the authorisation of Sidney Herbert) to the Ottoman Empire. They were deployed about 295 nautical miles (546 km; 339 mi) across the Black Sea from Balaklava in the Crimea, where the main British camp was based.