National War Labor Board

The National War Labor Board (NWLB), created in 1918, was a federal agency that mediated disputes between workers and management during World War I, preventing strikes that could disrupt war production while recognizing workers' rights to organize, which fueled union growth.

Verified for the 2027 AP US History examLast updated June 2026

What is the National War Labor Board?

The National War Labor Board (NWLB) was the federal government's referee between labor and management during World War I. Established in 1918, its whole job was simple in theory and messy in practice. Keep factories running. The U.S. couldn't afford strikes shutting down munitions plants or shipyards, so the NWLB negotiated settlements, pushed for fair wages, and supported the eight-hour workday in exchange for a no-strike pledge from workers.

Here's the part that matters most for APUSH. In order to get labor's cooperation, the government had to acknowledge that workers had legitimate rights, including the right to organize and bargain collectively. That was a big deal. For decades, the federal government had mostly sided with business during labor conflicts (think of the injunctions and federal troops in Unit 6). The NWLB flipped the script, at least temporarily, and union membership surged during the war. It's a perfect example of how wartime mobilization expanded federal power over the economy.

Why the National War Labor Board matters in APUSH

The NWLB lives in Topic 7.6 (World War I) in Unit 7: Progressivism to WWII, 1890-1945. It connects directly to learning objective APUSH 7.6.A, which asks you to explain the causes and effects of migration patterns during the war. The link works like this. War production created massive labor demand, which pulled African Americans north in the Great Migration and drew women into industrial jobs, and the NWLB was the agency managing that swollen, restless wartime workforce. The board also sets up the postwar story. When the war ended and the NWLB's protections evaporated, a huge strike wave hit in 1919, feeding directly into the Red Scare and attacks on labor activism that the CED highlights. For the broader course themes, the NWLB is evidence for how total war expands government's role in the economy, a pattern you'll see again with the New Deal and World War II.

How the National War Labor Board connects across the course

War Industries Board (Unit 7)

These two agencies are siblings in WWI mobilization. The War Industries Board coordinated what factories produced, while the NWLB managed the people working in them. Together they show the federal government taking unprecedented control of the wartime economy.

Labor Unions and Strikes (Units 6-7)

In Unit 6, the government usually crushed strikes (Pullman, Homestead). The NWLB marks a reversal, with the government actually recognizing workers' right to organize. Union membership grew during the war, then the gains collapsed in the 1919 strike wave once wartime protections ended.

Great Migration and African Americans (Unit 7)

The same wartime labor shortage the NWLB managed is what pulled African Americans to northern factories. Restricted European immigration plus booming war production opened industrial jobs that had been closed to Black workers.

Red Scare and the Bolshevik Revolution (Unit 7)

When the NWLB dissolved after the war, pent-up labor tension exploded into strikes in 1919. Against the backdrop of the Bolshevik Revolution, Americans read those strikes as radicalism, fueling the Red Scare and attacks on labor activism the CED emphasizes.

Is the National War Labor Board on the APUSH exam?

The NWLB shows up most often in multiple-choice questions about WWI home-front mobilization. A typical stem asks what the NWLB's recognition of workers' right to organize most directly influenced (answer: wartime union growth) or pairs it with other labor-market shifts like women entering munitions plants and the Great Migration. You need to do two things with this term. First, identify it as evidence of expanded federal economic power during wartime. Second, trace its effects forward to union growth, the 1919 strikes, and the Red Scare. No released FRQ has used the term verbatim, but it works as strong specific evidence in a long essay or DBQ about government's changing relationship with labor or the effects of WWI on American society. Pairing it with the War Industries Board makes a clean 'expanded federal power' argument.

The National War Labor Board vs War Industries Board

Both were WWI agencies with nearly identical names, so they get swapped constantly. The War Industries Board (led by Bernard Baruch) coordinated production, telling factories what to make and allocating raw materials. The National War Labor Board handled workers, mediating disputes and preventing strikes. A quick trick is to read the middle word. 'Industries' means stuff, 'Labor' means people.

Key things to remember about the National War Labor Board

  • The National War Labor Board was created in 1918 to mediate labor disputes and prevent strikes from disrupting World War I production.

  • In exchange for a no-strike pledge, the NWLB recognized workers' right to organize, which caused union membership to grow during the war.

  • The NWLB is a textbook example of how wartime mobilization expanded federal power over the economy, alongside the War Industries Board.

  • When the NWLB's wartime protections ended, labor unrest exploded into the 1919 strike wave, which fed the Red Scare and attacks on labor activism.

  • Don't confuse it with the War Industries Board, which managed production and materials rather than workers and wages.

Frequently asked questions about the National War Labor Board

What did the National War Labor Board do?

Created in 1918, the NWLB mediated disputes between workers and management during World War I so strikes wouldn't disrupt war production. It pushed for fair wages and the eight-hour day while securing a no-strike pledge from labor.

How is the National War Labor Board different from the War Industries Board?

The War Industries Board coordinated industrial production, deciding what factories made and allocating raw materials. The NWLB dealt with workers, settling wage disputes and preventing strikes. One managed stuff, the other managed people.

Did the National War Labor Board permanently protect workers' rights?

No. Its protections were a wartime measure and disappeared after 1918, which is partly why the massive strike wave of 1919 happened. Lasting federal protection of collective bargaining didn't arrive until the New Deal era in the 1930s.

Is the National War Labor Board the same as the WWII labor board?

No, they're two different agencies with the same name. The original NWLB operated in 1918 during World War I, and a second National War Labor Board was created in 1942 for World War II. In APUSH Topic 7.6, you're dealing with the 1918 version.

Why does the National War Labor Board matter for the APUSH exam?

It's go-to evidence for two big patterns: wartime expansion of federal power and the rise (then collapse) of labor gains around WWI. Multiple-choice questions often ask what its recognition of workers' right to organize most directly influenced, and the answer is wartime union growth.