Monetary policy fundamentally changed from the onset of World War II in 1941 to the Treasury-Fed Accord in 1951.
President Truman signed the Act in 1946 in the aftermath of WWII
A new international monetary system was forged in 1944
The Fed pegged interest rates at a low level during WWII and enforced the peg after the war ended
The Federal Reserve supported the war effort in several ways