American entry into World War II on December 8, 1941, significantly changed the NLRB. On January 12, 1942, President Roosevelt created the National War Labor Board (NWLB), which displaced the NLRB as the main focus of federal labor relations for the duration of the war. The NWLB was given the authority to "finally determine" any labor dispute which threatened to interrupt war production, and to stabilize union wages and benefits during the war. Although Roosevelt instructed the NWLB not to intrude on jurisdiction exercised by the NLRB, the War Labor Board refused to honor this request. From 1942 to 1945, Millis tried to secure a jurisdictional agreement with NWLB Chairman George W. Taylor. But these discussions proved fruitless, and Millis broke them off in June 1945. The NWLB also heavily raided the NLRB for staff, significantly hindering NLRB operations.