Answer:
The war led to a dramatic output of equipment that was lent to nations that expanded their economy.
Explanation:
United States:
Right after the Great War, the United States became isolated and after helping Germany pay its reparations to the Allies due to the Treaty of Versailles its economy crashed and the Great Depression affected America and many other countries. After Pearl Harbor, the United States entered the war and it became a military superpower like the Soviets, they started to produce lots of equipment they lent to nations.
USSR:
The Soviet Union or the Union of Soviet Socialist Republics was a new country established after a successful revolution of the communist who came into power. The Soviet Union was forced to give up its territory in the Great War because the government sued for peace. The Russian economy had been devastated for years under the Russian Empire and WW2 when Germany turned on the Soviets after the betrayal of their treaty between their non-aggression they began to produce at a rate never seen before in the war.