The United States experienced the greatest economic growth during World War I, as its economy expanded by over 20%.

The main economic impact of World War I on the United States was increased industrial production, as the country's factories were converted to produce war materials.

Germany experienced the greatest economic decline during World War I, as its economy contracted by over 15%.

The main economic impact of World War I on Germany was decreased industrial production, as the country's factories were destroyed or converted to produce war materials.

The United States experienced the greatest economic growth during World War II, as its economy expanded by over 50%.

The main economic impact of World War II on the United States was increased industrial production, as the country's factories were converted to produce war materials.

Germany experienced the greatest economic decline during World War II, as its economy contracted by over 25%.

The main economic impact of World War II on Germany was decreased industrial production, as the country's factories were destroyed or converted to produce war materials.

The main economic impact of World War I on the global economy was increased global debt, as countries borrowed heavily to finance the war effort.

The main economic impact of World War II on the global economy was increased global debt, as countries borrowed heavily to finance the war effort.

The United States experienced the greatest economic growth in the aftermath of World War I, as its economy continued to expand rapidly.

Germany experienced the greatest economic decline in the aftermath of World War I, as its economy was devastated by the war.

The United States experienced the greatest economic growth in the aftermath of World War II, as its economy continued to expand rapidly.

Germany experienced the greatest economic decline in the aftermath of World War II, as its economy was devastated by the war.

The main economic impact of the World Wars on the global economy was increased global debt, as countries borrowed heavily to finance the war effort.