The Petrograd Soviet, weakness of the Provisional Government, economic and social problems, and continuation of the war led to growing unrest and support for the Soviets
Led by Lenin, the Bolsheviks seized power
Following the failure of the June Offensive, morale in the army fell rapidly, increasing numbers of soldiers deserted, and shortages continued, leading to widespread unrest in Petrograd between the 3rd and 6th of July
Sailors from Kronstadt protested in the city and soldiers joined them, with thousands of protesters awaiting instructions from the Petrograd Soviet and the Bolsheviks
The uprising was suppressed by loyal troops brought in by the Provisional Government, and several Bolshevik leaders, including Trotsky, were arrested
In August 1917, Lavr Kornilov, a Russian General, attempted to seize power, but the Bolsheviks, under Trotsky's direction, organized the defence of the city and gained support by saving the revolution from a loyal Tsarist general
By September, the Bolsheviks had gained control of the Petrograd Soviet