before Andranik could arrive, British troops under General W. M. Thomson encouraged him to retreat, out of concerns that Armenian military activity could have an adverse effect on the region's status, which was to be decided at the 1919 Paris Peace Conference. Trusting Thomson, Andranik left, and British troops occupied Karabakh. The British command provisionally affirmed Sultanov (appointed by the Azerbaijani government) as the governor-general of Karabakh and Zangezur, pending the final decision by the Paris Peace Conference. Ethnic conflict began to erupt in the region. Оn 5 June 1919, 600 Armenian inhabitants of the villages surrounding Shusha were massacred by Azerbaijani and Kurdish irregulars. Sultanov stated that the irregulars were not under his control. In August 1919, the Karabakh National Council was forced to enter into a provisional treaty agreement with the Azerbaijani government, recognizing the authority of the Azerbaijan government until the issue of the mountainous part of Karabakh was settled at the Paris Peace Conference. Despite signing the agreement, the Azerbaijani government continuously violated the terms of the treaty, and Sultanov employed severe measures against them, such as terror, blockade and famine. Sultanov gathered troops in the region and on 19 February 1920 issued an ultimatum to the Armenians, demanding they accept unconditional unification with Azerbaijan, and then massacred the population of several Armenian villages, including Khankendi (Stepanakert). A minority of Karabagh National Council representatives gathered in Shusha to accept Sultanov's demands, while the rest met in nearby Shushikend to reject the ultimatum. The strife culminated in an Armenian uprising, which was suppressed by the Azerbaijani army. In late March 1920, the Armenian half of the police forces was reported by a British journalist to have murdered the Azerbaijani half during the latter's traditional Novruz Bayram holiday celebrations. The Armenian surprise attack was organised and coordinated by the forces of the Armenian Republic. Azerbaijani outrage for this surprise attack ultimately led to the massacre and expulsion of the Armenian population in March 1920, in which 500–8,000 to 20,000 Armenians were killed, others were forced to flee, and the Armenian half of the city, 1,675 of 1,700 homes, were destroyed. A report from Dashnak archives states that 8,000 Armenians escaped from the city, whilst 5,000–6,000 remained behind. According to the description of an Azerbaijani communist Ojahkuli Musaev: Nadezhda Mandelstam wrote about Shusha in the 1920s, "in this town, which formerly of course was healthy and with every amenity,