What event is referred to as "Bloody Sunday" in the context of early 20th-century Russia?

The event referred to as "Bloody Sunday" in early 20th-century Russia is the 1905 massacre of protestors outside the czar's palace. This tragic event occurred on January 22, 1905, when a large group of peaceful demonstrators marched toward the Winter Palace in St. Petersburg to present a petition to Tsar Nicholas II, seeking reforms and better working conditions. The tsar's troops opened fire on the unarmed crowd, resulting in numerous deaths and injuries, which shocked the nation and led to widespread unrest.

The significance of this event lies in how it galvanized public opinion against the monarchy and contributed to the broader wave of revolutionary sentiment in Russia. It marked a turning point that would ultimately lead to the establishment of the Duma, Russia's first parliament, and foreshadowed the more tumultuous events of the Russian Revolution later in 1917. The outrage stemming from Bloody Sunday played a crucial role in diminishing the legitimacy of the tsarist regime and set the stage for future revolutionary activities.

Other options refer to distinct historical events that, while significant, are not what is identified as "Bloody Sunday." For instance, the storming of the Winter Palace and the October Revolution are related to the