By June President Habyarimana had come to view Hutu Power, rather than the mainstream opposition, as the biggest threat to his leadership. This led him to change tactics and engage fully with the Arusha peace process, giving it the impetus it needed to draw to a completion. According to Prunier this support was more symbolic than genuine. Habyarimana believed he could maintain power more easily through a combination of limited concessions to the opposition and RPF than he could if Hutu Power were allowed to disrupt the peace process. The negotiation of troop numbers was protracted and difficult; twice the talks almost collapsed. The Rwandan Government wanted to allocate only 15% of the officer corps to the RPF, reflecting the proportion of Tutsi in the country, while the RPF was arguing for a 50/50 split. The RPF were in a superior position following their successful February campaign and were backed in their demands by Tanzania, which was chairing the talks. The government eventually agreed to their demands. As well as 50% of the officer corps, the RPF was allocated up to 40% of the non-command troops. The deal also mandated large-scale demobilisation; of the 35,000 Rwandan Army and 20,000 RPF soldiers at the time of the accords, only 19,000 would be drafted into the new national army. With all details agreed the Arusha Accords were finally signed on 4August 1993 at a formal ceremony attended by President Habyarimana as well as heads of state from neighbouring countries.