support units remained. As Federation of the colonies approached, on 24 August 1899 the colonial artillery units were merged into the first Australian federal army unit. Early conflicts Boer War Before Federation of Australia and the forming of the national army, the six self-governing and independent Australian colonial governments sent contingents to South Africa to serve in the Second Boer War. The first offer of 250 mounted troops came from the new colony of Queensland in July 1899, some months before the declaration of war. The first arrivals of Australian troops was the First New South Wales Contingent which arrived in November 1899, after departing London. A detachment, sent from Australia in October 1899, was known as the Australian Regiment and was an infantry unit, made up mainly of volunteers from the Colonies of Victoria, Tasmania, South Australia and Western Australia, who left on one ship for Cape Town. Due to the way the war developed, these troops were converted from infantry to mounted infantry. Strong resistance from the Boer Afrikaner forces led to further recruiting in the Australian colonies. Known as Bushmen's Contingents, these soldiers were usually volunteers with horse-riding and shooting skills but no military experience. After Federation in 1901, eight Australian Commonwealth Horse battalions were sent. Many of the Australian units had a short tour of duty and some were subject to restructuring. Later Australians transferred to, or enlisted into multinational units, such as the Bushveldt Carbineers, in which Harry "Breaker" Morant and Peter Hancock served, before their court martial and execution for alleged war crimes. Australian units served at many notable actions, including the relief of Mafeking, Sunnyside, Slingersfontein, Pink Hill, the Relief of Kimberley, Paardeburg, Bloemfontein, the Siege of Eland's River, Rhenosterkop and Haartebeestefontein. Australians were there for the capture of Johannesburg and were first into Pretoria. Later they participated at Diamond Hill. In all, 16,175 Australians, with 16,314 horses, served in the Boer War; 251 were killed in action, 267 died of other causes and 43 went missing in action. Six Victoria Crosses were awarded to Australians, five serving with Australian contingents and one serving with the South African Constabulary. Many Australians did more than one tour of duty and a number remained after the war and settled in-country; while others returned to Australia then returned to South Africa. Boxer Rebellion The Boxer Rebellion in China began in 1900, and a number of western