When the communists first came to power in the Russia the state was in a pitiful state, i.e. hardly industrialized, little roads education and healthcare etc. A major problem was how to industrialize and industrialize quickly.
Another was food shortages, collectivization in the Soviet Union led to a huge reduction in food production and the country went through many famines as a result.
Technology was also an issue although the Soviet Union was a super power after the second world war they struggled with production and creating some items most famously jeans.
Along with this the threat of capitalism and simply trying to keep up with the US in terms of economic development and technological advances e.g. the space race.
As the Soviet Union expanded a serious issue was trying to incorporate many different nations with different languages and cultures into one country. Many countries had uprising and revolts due to nationalism.
Finally the last major issue was with their economy. Oil provided a huge amount of money into the soviet economy. With a number of devastating drops in oil prices led to in-balances/shortfalls in the countries finances and this caused vast debts. look at the theory of resource curse, as with the Soviet union having so much oil, it led to an increase in corruption and red tape.
Bulgaria.
The United States and the Soviet Union were allied in World War II, but faced each other in the Cold War of the 1960s.
The Soviet Union had many strengths and many weaknesses. One important and historic problem it faced was in the area of agriculture. The prime example of this was that the USSR had to buy grain from the US in the 1970's to feed the Soviet people.
There is no reason for them to be ... These countries were never members of the Soviet Union and traditionally they have faced westwards and not eastwards.
Communism
Bulgaria.
They faced the Soviet Union.
The United States and the Soviet Union were allied in World War II, but faced each other in the Cold War of the 1960s.
The Soviet Union had many strengths and many weaknesses. One important and historic problem it faced was in the area of agriculture. The prime example of this was that the USSR had to buy grain from the US in the 1970's to feed the Soviet people.
Estonia has a parliamentary democracy. Formally, it was occupied by many countries, such as Germany and Russia (at the time called the Soviet Union). It faced threats of communism, but declared independance in March 1990.
There are many problems that are faced by the African Union. The biggest challenge is lack of unity among the African leaders which makes it impossible to implement any policies.
Kenedy faced challenges from the spread of communism and the continuing threat of nuclear war. He was enthusiastic and committed to change. This lead to his being able to achieve the first agreement with the Soviet Union limiting nuclear testing.
By 1924, the new Soviet Union had been recognized by all the major world powers. Only the US, remained as a hold out.
the mountains were difficult to cross
The US and the USSR faced each other in the Cold War.
That was Nikita Khrushchev.
Communism has never existed, whether in Eastern Europe or elsewhere. Communism is a global society with no countries or rulers or classes or money. What existed in Eastern Europe was state capitalism.