Bloody Sunday (1905)
Bloody Sunday took place in Russia in 1905. More than 3,000 people marched towards the Winter Palace in hopes of presenting Tsar Nicholas II a petition for reform, however he was not present at the palace.  Without the order of the tsar to stop them, the army shot their rifles into the crowd, leaving 96 dead and around 300 wounded. This event is considered a cause of the Russian Revolution.