Growing economic differences combined with developing political tensions between the USA and the Soviet Union (which would eventually develop into the Cold War) were manifested in the refusal in 1947 of the SMAD to take part in the USA's Marshall Plan.
As crecentes diferenzas económicas combinábanse co desenvolvemento de tensións políticas entre Estados Unidos e a Unión Soviética (que culminaría no desenvolvemento da guerra fría) e manifestáronse no rexeitamento do SMAD en 1947 de participar no Plan Marshall norteamericano.