almost completely subordinate to the president and none of them had enjoyed strong public approval, with Yevgeny Primakov and Putin's previous tenure (1999–2000) as prime minister under Boris Yeltsin being the only exceptions. Journalists quickly dubbed the new system with a practically dual-headed executive as "government by tandem" or "tandemocracy", with Medvedev and Putin called the "ruling tandem". Daniel Treisman has argued that early in Medvedev's presidency, Putin seemed ready to disengage and started withdrawing to the background. In the first year of Medvedev's presidency, two external events threatening Russia—the late-2000s financial crisis and the 2008 South Ossetia war—changed Putin's plans and caused him to resume a stronger role in Russian politics. Main external events 2008 Russo-Georgian War The long-lingering conflict between Georgia and the separatist regions of South Ossetia and Abkhazia, which were supported by Russia, escalated during the summer of 2008. On 1 August 2008, the Russian-backed South Ossetian forces started shelling Georgian villages, with a sporadic response from Georgian peacekeepers in the area. Intensifying artillery attacks by the South Ossetians broke a 1992 ceasefire agreement. To put an end to these attacks, the Georgian army units were sent in to the South Ossetian conflict zone on 7 August. Georgian troops took control of most of Tskhinvali, a separatist stronghold, in hours. At the time of the attack, Medvedev was on vacation and Putin was attending the opening ceremony of the 2008 Beijing Olympics. At about 1:00 a.m on 8 August, Medvedev held a telephone conversation with the Defence Minister, Anatoliy Serdyukov. It is likely that during this conversation, Medvedev authorised the use of force against Georgia. The next day, Medvedev released a statement, in which he said: In the early hours of 8 August, Russian military forces launched a counter-offensive against Georgian troops. After five days of heavy fighting, all Georgian forces were routed from South Ossetia and Abkhazia. On 12 August, Medvedev ended the Russian military operation, entitled "Operation to force Georgia into peace". Later on the same day, a peace deal brokered by the French and EU president, Nicolas Sarkozy, was signed between the warring parties. On 26 August, after being unanimously passed by the State Duma, Medvedev signed a decree recognising South Ossetia and Abkhazia as independent states. The five-day conflict cost the lives of 48 Russian soldiers, including 10 peacekeepers, while the casualties for Georgia was 170 soldiers and 14 policemen. The Russian