Minin and Pozharsky
Amidst anarchy and breakdown of central government, citizens of Nizhny Novgorod led by Kuzma Minin assembled the Second People's Militia, under the command of Prince Dmitry Pozharsky. Well-armed and organized, the Second People's Militia took Yaroslavl in March of 1612 and set up a provisional government of all Russia, getting support and provisions from many cities of Russia and Siberia. Getting news that a Polish relief army under Hetman Chodkiewicz was approaching Moscow, Minin and Pozharsky entered Moscow in August 1612 and besieged the Polish garrison in the Kremlin.