The following is a list of political parties in the Soviet Union:
Communist Party of the Soviet Union (established in January 1912, dissolved in August 1991)
Liberal Democratic Party of the Soviet Union (established in March 1989, dissolved in April 1991)
Liberal Democratic Party of Russia (established in April 1991 as a successor to the LDPSU)
Answer:The invasion, consisting of two distinct campaigns, was ordered by the Persian king Darius the Great primarily in order to punish the city-states of Athens and Eretria.
Day (officially Birthday of Martin Luther King, Jr.) is an American federal holiday marking the birthday of Martin Luther King Jr.<span> It is observed on the third Monday of January each year, which is around King's birthday, January 15.</span>
I'm pretty sure it's immigration. The people performing that action is called immigrants. So, the act of moving to one nation from another is called immigration.