May 30, 1917 (May 17, 1917 old style)
The Kronstadt Soviet declares itself the sole governing power of Kronstadt.
June 12-16, 1917 (May 30 – June 3, 1917 old style)
The First Conference of Petrograd Factory Committees takes place and supports Bolshevik policies. There will be four more conferences prior to the Bolshevik revolution. See the next one on August 20 – 25, 1917 (August 7 – 12, 1917 old style)
June 13, 1917 (May 31, 1917 old style)
Minister of War Guchkov, a member of the Cadet party, resigns after street demonstrations against him. Kerensky replaces him.
June 16 – July 7, 1917 (June 3 – 24, 1917 old style)
The First All-Russian Congress of Workers’ and Soldiers’ Soviets begins in Petrograd. The Socialist Revolutionaries have the majority, the Bolsheviks and the Mensheviks the minority. The Congress almost unanimously agrees to end World War I, though only through tremendous consternation agrees to support the Provisional Government, despite Bolshevik protests. Tensions flare between the parties, with the Mensheviks insisting that the Bolsheviks must be disarmed, despite not having weapons, which would in practice mean disarming the Soldiers’ Soviets. The Bolsheviks insist that all power must go to the Soviets.
June 18, 1917 (June 5, 1917 old style)
The Parliament in Finland (a territory of Russia) declare Finland a sovereign state, except on questions of foreign policy and war. The Provisional Government sends troops to crush the Parliament, which soon wavers, and votes in favor of their own dissolution.
June 23, 1917 (June 10, 1917 old style)
the Central Rada (formed in Kiev on March 17) proclaim the independence of the Ukraine. The ongoing Congress of Soviets unanimously supports this declaration of independence. The demonstration the Bolsheviks planned to hold against the Government is banned. The Mensheviks then go factory to factory, telling workers not to stage a demonstration, who in turn berate the Mensheviks. The Mensheviks see a massive conspiracy — “The masses are thick with Bolsheviks” — and secretly ask the Cossacks to help them crush the Bolsheviks, to which the Cossack ataman replies: “We, Cossacks, will never go against the Soviet.” Whole regiments accept the ban on the demonstration solely on the basis of Bolshevik acceptance, whose party policy wholly accepts any and all decisions of the Soviet.