The Provisional Government that ruled Russia after the February Revolution faced several weaknesses and mistakes that undermined its authority. It lacked a strong power base since it had simply assumed leadership without a popular mandate. It was also unable to resolve important issues like land reform in a timely manner. Additionally, the Provisional Government struggled to end Russian participation in World War I as desired by the Petrograd Soviet, which exercised power through the Bolshevik-controlled Red Guards. Several crises, like the June offensive and Kornilov Affair, further weakened the Provisional Government and strengthened the Bolsheviks.