Question: What happened to the region's trade flow during the Marshall Plan?
About the article "Marshall Plan", section "Wartime destruction".

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The reconstruction plan, developed at a meeting of the participating European states, was established on June 5, 1947.
It offered the same aid to the Soviet Union and its allies, but they did not accept it, as to do so would be to allow a degree of US control over the Communist economies.
During the four years that the plan was operational, US donated $15 billion in economic and technical assistance to help the recovery of the European countries that had joined in the Organization for European Economic Co-operation.
In 2013, the equivalent sum reflecting currency inflation since 1948 totalled roughly $148 billion.
The $15 billion was in the context of a US GDP of $258 billion in 1948, and was on top of $15 billion in American aid to Europe between the end of the war and the start of the Plan that is counted separately from the Marshall Plan.
The Marshall Plan was replaced by the Mutual Security Plan at the end of 1951.
The ERP addressed each of the obstacles to postwar recovery.
The plan looked to the future, and did not focus on the destruction caused by the war.
Much more important were efforts to modernize European industrial and business practices using high-efficiency American models, reducing artificial trade barriers, and instilling a sense of hope and self-reliance.
By 1952, as the funding ended, the economy of every participant state had surpassed pre-war levels; for all Marshall Plan recipients, output in 1951 was at least 35% higher than in 1938.
Over the next two decades, Western Europe enjoyed unprecedented growth and prosperity, but economists are not sure what proportion was due directly to the ERP, what proportion indirectly, and how much would have happened without it.
A common American interpretation of the program's role in European recovery is the one expressed by Paul Hoffman, head of the Economic Cooperation Administration, in 1949, when he told Congress that Marshall aid had provided the "critical margin" on which other investment needed for European recovery depended.
The Marshall Plan was one of the first elements of European integration, as it erased trade barriers and set up institutions to coordinate the economy on a continental level — that is, it stimulated the total political reconstruction of western Europe.
Belgian economic historian Herman Van der Wee concludes the Marshall Plan was a "great success": "It gave a new impetus to reconstruction in Western Europe and made a decisive contribution to the renewal of the transport system, the modernization of industrial and agricultural equipment, the resumption of normal production, the raising of productivity, and the facilitating of intra-European trade."
The Marshall Plan aid was divided amongst the participant states on a roughly per capita basis.
A larger amount was given to the major industrial powers, as the prevailing opinion was that their resuscitation was essential for general European revival.
Somewhat more aid per capita was also directed towards the Allied nations, with less for those that had been part of the Axis or remained neutral.
The table below shows Marshall Plan aid by country and year (in millions of dollars) from "The Marshall Plan Fifty Years Later."
There is no clear consensus on exact amounts, as different scholars differ on exactly what elements of American aid during this period were part of the Marshall Plan. 
By the end of World War II, much of Europe was devastated.
Sustained aerial bombardment during the war had badly damaged most major cities, and industrial facilities were especially hard-hit.
The region's trade flows had been thoroughly disrupted; millions were in refugee camps living on aid from United Nations Relief and Rehabilitation Administration and other agencies.
Food shortages were severe, especially in the harsh winter of 1946–1947.
Especially damaged was transportation infrastructure, as railways, bridges, and docks had been specifically targeted by air strikes, while much merchant shipping had been sunk.
Although most small towns and villages had not suffered as much damage, the destruction of transportation left them economically isolated.
None of these problems could be easily remedied, as most nations engaged in the war had exhausted their treasuries in its execution.
The only major powers whose infrastructure had not been significantly harmed in World War II were the United States and Canada.
They were much more prosperous than before the war but exports were a small factor in their economy.
Much of the Marshall Plan aid would be used by the Europeans to buy manufactured goods and raw materials from the United States and Canada.
One of Marshall's ideas was the concept of “system generalists.” When applied to the Everglades, a generalist means professionals who are not simply scientists specializing in one discipline, but those who possess a full understanding of the chemistry, geology, hydrology, ecology and overall environmental significance of the system and also have an appreciation for its historic and aesthetic value.
He also wrote what is referred to as “The Marshall Plan” - a blueprint for Everglades restoration that is still viable today.
The plan emphasized the need for 'sheet flow', the slow movement of surface water in a southerly direction that is natural and essential to the Everglades ecosystem.
The scheme promoted in the Marshall Plan helps retain water in the wetlands and preserves the original habitat found in the ancient Everglades.  
The United States helped revive the French economy with the Marshall Plan whereby it gave France $2.3 billion with no repayment.
France agreed to reduce trade barriers and modernize its management system.
The total of all American grants and credits to France, 1946–53, came to $4.9 billion.