at the Battle of Magersfontein and Battle of Stormberg also involved forces under his command. Because of concerns about his performance and negative reports from the field he was replaced in January 1900 as overall commander in South Africa by Lord Roberts. Defeats and questionable ability as commander soon earned him the nickname "Reverse Buller" among troops. He remained as second-in-command and suffered two more setbacks in his attempts to relieve Ladysmith at the battles of Spion Kop and Vaal Krantz. On his fourth attempt, Buller was victorious in the Battle of the Tugela Heights, lifting the siege on 28 February 1900, the day after Piet Cronje at last surrendered to Roberts at Paardeberg. After Roberts took Bloemfontein (13 March 1900), Buller correctly predicted that the Boers would take to guerrilla warfare. Later he was successful in flanking Boer armies out of positions at Biggarsberg, Laing's Nek and Lydenburg. It was Buller's veterans who won the Battle of Bergendal in the war's last set-piece action. Buller was also popular as a military leader amongst the public in England, and he had a triumphal return from South Africa with many public celebrations, including those on 10 November 1900 when he went to Aldershot to resume his role as General Officer Commanding Aldershot District, later to be remembered as "a Buller day". He spent the following months giving lectures and speeches on the war, was promoted to a Knight Grand Cross of the Order of St Michael and St George (GCMG) in Nov 1900, and received the Honorary Freedom of the Borough of Plymouth in April 1901. However, his reputation had been damaged by his early reverses in South Africa, especially within the Unionist government. When public disquiet emerged over the continuing guerrilla activities by the defeated Boers, the Minister for War, St. John Brodrick and Lord Roberts sought a scapegoat. The opportunity was provided by the numerous attacks in the newspapers on the performance of the British Army. The matter came to a head when a virulent piece written by The Times journalist Leo Amery was publicly answered by Buller in a speech on 10 October 1901. Brodrick and Roberts saw their opportunity to pounce and, summoning Buller to an interview on 17 October, Brodrick, with Roberts in support, demanded his resignation on the grounds of breaching military discipline. Buller refused and was summarily dismissed on half pay on 22 October.