1- The Soviet Union didn't rebuild Western Europe under the Marshall Plan, as that was made by the United States.
The Marshall Plan was an initiative of the United States to help Western Europe, in which the Americans gave economic aid worth about 14 billion dollars for the reconstruction of those countries in Europe devastated after the Second World War. The plan was in operation for four years since 1948.
2- The Marshall Plan wasn't intended to increase the United States' economic importance.
The objectives of the United States were to rebuild those areas destroyed by the war, eliminate barriers to trade, modernize European industry and make the continent prosperous again; all these objectives were intended to prevent the spread of communism, which had a large and growing influence in post-war Europe.
