Why did Russia want to overthrow czar Nicholas II?

In March 1917, the army garrison at Petrograd joined striking workers in demanding socialist reforms, and Czar Nicholas II was forced to abdicate. In July 1918, the advance of counterrevolutionary forces caused the Yekaterinburg Soviet forces to fear that Nicholas might be rescued.

Explanation:

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March 1917, Army garrison at Petrograd joined striking workers in demanding socialist reforms, and Czar Nicholas II was forced to abdicate

Explanation:

The advance of counterrevolutionary forces caused the Yekaterinburg Soviet forces to fear that Nicholas might be rescued.

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explanation:

the most famous of all the units fighting in cuba, the "rough riders" was the name given to the first u.s. volunteer cavalry under the leadership of theodore roosevelt. roosevelt resigned his position as assistant secretary of the navy in may 1898 to join the volunteer cavalry. the original plan for this unit called for filling it with men from the indian territory, new mexico, arizona, and oklahoma. however, once roosevelt joined the group, it quickly became the place for a mix of troops ranging from ivy league athletes to glee-club singers to texas rangers and indians.