After the events of December 7th 1941 in Pearl Harbor the U.S. declared war against Japan and a few days later against Germany and Italy. In order to beeing able to fight the war the nation would need that the industries be on full production without any trouble.
On December 15th 1941 the Executive Council of the American Federation of Labor unanimously voted for a non-strike policy in war industries. This was presented a few days before in a meeting called by the president Franklin Delano Roosevelt with the labor and industry representatives. In that meeting the discussion theme was the prevention of any labor dispute in the war industry during the time the war endures.
Both sides of the war industry, the labor and industrial were in favor of this policy; the president of the American Federation of Labor William Green said: “Labor knows its duty. It will do its duty, and more. No new laws are necessary to prevent strikes. Labor will see to that. American workers will now produce as the workers of no other country have ever produced.” While Philip Murray, president of the Congress of Industrial Organization said in a radio speech that they “were ready and eager to do their utmost to defend our country against the outrageous aggression of Japanese imperialism, and to secure the final defeat of the forces of Hitler.”
The meeting between the labor and management part began on December 17th and the result was an unconditional non-strike pledge from the labor and no-lockout pledge form the management, there was some controversies but they were dismissed by Roosevelt who accepted only the points in which both parts had an agreement and codified the conclussion as this: “1. There shall be no strikes or lockouts. 2. All disputes shall be settled by peaceful means. 3. The President shall set up a proper War Labor Board to handle these disputes.”
So a proper answer to the question is that the U.S. government draw near both parts of the war industry to arrange a non-stirke and no.lockout pledge to secure the production.
I hope that the answer is correct and help you.