On 22nd January 1905, in St petersburg Russia, a procession of workers led by father Gapon reached the Winter palace.
This procession was attacked by police and cossacks. When the procession of workers led by Father Gapon reached the Winter Palace it was attacked by the police and the Cossacks.
Over 100 workers were killed and about 300 wounded. The incident, known as Bloody Sunday, started a series of events that became known as the 1905 Revolution.