Question: what was the first port used by Australian Commonwealth Horse

<P0-S0> Durban (Zulu: "eThekwini" , from "itheku" meaning "bay/lagoon") is the largest city in the South African province of KwaZulu-Natal. <P0-S1>  Durban's metropolitan municipality ranks third among the most populous urban areas in South Africa after Johannesburg and Cape Town. <P0-S2>  It is also the second most important manufacturing hub in South Africa after Johannesburg. <P0-S3>  It forms part of the eThekwini Metropolitan Municipality. <P0-S4>  It is also seen as one of the major centres of tourism because of the city's warm subtropical climate and extensive beaches. <P0-S5>  The municipality, which includes neighbouring towns, has a population of almost 3.5 million, making the combined municipality one of the biggest cities on the Indian Ocean coast of the African continent. <P0-S6>  It is the largest city in KwaZulu-Natal which is the 2nd most populous province in South Africa. <P0-S7>  It has the highest number of dollar millionaires added per year of any South African city with the number rising 200 per cent between 2000 and 2014. <P0-S8>  In May 2015, Durban was officially recognised as one of the New7Wonders Cities together with Vigan, Doha, La Paz, Havana, Beirut, and Kuala Lumpur. <P0-S9>  Durban is famous for being the busiest port in South Africa. <SEP> <P1-S0> Thomas Joseph "Tom" Collins (6 April 1884 – 15 April 1945) was an Australian politician and stock and station agent, born at Yass, New South Wales to storekeeper John Collins and Mary, née Hartigan. <P1-S1>  In 1902, having attended the local Catholic school, he enlisted in the 5th Battalion, Australian Commonwealth Horse, to fight in the Boer War. <P1-S2>  However, by the time Collins's unit arrived, the war had finished. <SEP> <P2-S0> The Australian Commonwealth Horse (ACH) was a mounted infantry unit of the Australian Army formed for service during the Second Boer War in South Africa in 1902 and was the first expeditionary military unit established by the newly formed Commonwealth of Australia following Federation in 1901. <P2-S1>  Over 4,400 men enlisted in the ACH in three contingents, with troops and squadrons raised in each state and combined to form battalions. Eight battalions were raised, with the first arriving in Durban in March 1902. <P2-S2>  The 1st and 2nd battalions saw limited active service, conducting patrols against the Boers during the last great drives that ultimately ended the war. <P2-S3>  The war ended before the remaining battalions arrived to see action, and by the time peace came on 31 May 1902, the majority of the third contingent, consisting of the 5th, 6th, 7th and 8th Battalions, still remained at sea bound for South Africa. <P2-S4>  The ACH suffered no fatal casualties in action, although 28 men died from illness. <SEP> <P3-S0> The Royal Australian Army Medical Corps (RAAMC) is the branch of the Australian Army responsible for providing medical care to Army personnel. <P3-S1>  The AAMC was formed in 1902 through the amalgamation of medical units of the various Australian colonies and was first deployed to South Africa as a small detachment of personnel supporting the Australian Commonwealth Horse during the Second Boer War. <P3-S2>  Since then the corps has participated in every Australian Army operation since then including wars and peacekeeping operations. <P3-S3>  The "Royal" prefix was granted in 1948.