During World War I, U.S. farmers experienced increased prices for commodities as Europe's farms were devastated and the U.S. increased food production. However, after the war ended in 1919, prices started declining as European agriculture recovered and reduced demand. Throughout the 1920s, farmers struggled with low prices as consumers ate less cereals and grains and new synthetic products narrowed markets. Attempts to raise prices by taking land out of production failed because productivity increased through innovations, keeping supply high despite reduced acreage. The 1920s were a difficult time for many American farmers due to these economic forces beyond their control.