The United Nations Observer Mission in Georgia (UNOMIG) was established by United Nations Security Council Resolution 858 in August 1993 to verify compliance with a 27 July 1993 ceasefire agreement between the Republic of Georgia and forces in Abkhazia with special attention given to the situation in the city of Sukhumi, Georgia. It was also to investigate reports of ceasefire violations, attempt to resolve such incidents with the parties involved, and to report to the Secretary-General of the United Nations on the implementation of its mandate. 88 military advisors were authorized to be deployed to the region. It ended on 15 June 2009, when Russia vetoed an extension of the mission. The last observers left the region on 15 July 2009.