<span>Czar Nicholas II was executed by
Bolshevik forces in July of 1918. The Bolsheviks were committed to the
ideas of Karl Marx, and they believed that the working classes would
free themselves from the economic and political control of the ruling
class. They wanted to form a socialist society based on equality. The
provisional government was never elected, and it chose to remain in
World War I, despite the fact that the country was ill-equipped to fight
against Germany. This made people more in favor of the revolution.
Please mark me as brainliest
</span>
To begin with, a political machine is an organization in which an organization gains support via promising rewards to those who keep them in power. It's designed to keep a particular group in power by promising favors. Typically, immigrants who first arrived here were impoverished, so political machines became so successful because they would promise to set immigrants up with homes or jobs or food so long as they had their vote.
So in short:
Who: Organizations whose main goals were getting and keeping power.
What: They essentially bribed immigrants for their votes.
Why: Political Machines did this to stay in power.
Imperial expansion is when an imperialistic country expands by taking over territories of other countries.