These events, along with accusations of Georgian involvement in the Second Chechen War, resulted in a severe deterioration of relations with Russia, fuelled also by Russia's open assistance and support to the two secessionist areas. Despite these increasingly difficult relations, in May 2005 Georgia and Russia reached a bilateral agreement by which Russian military bases (dating back to the Soviet era) in Batumi and Akhalkalaki were withdrawn. Russia withdrew all personnel and equipment from these sites by December 2007 while failing to withdraw from the Gudauta base in Abkhazia, which it was required to vacate after the adoption of the Adapted Conventional Armed Forces in Europe Treaty during the 1999 Istanbul summit.