larger than the amount in the Women's Land Army, foreign migrant workers and the amount of prisoners of war who were laborers. These volunteers were mainly from the cities and urban areas. Volunteers mostly worked for three months in the summer and for a fourth if high schools decided to push starting dates back. To join, a volunteer needed the consent of their parent(s)/guardian(s). There were three types of work environments for the volunteers. The most common (80% of volunteers) involved them being transported to a worksite daily via buses or farming trucks and returned home at night. Another program involved where volunteers lived with farming families and worked alongside them with about 1 in 5 doing this. There was also camps set up which were not very common as only 4% of all VFV volunteers lived there between 1943 & 1945. Labor unions The war mobilization changed the relationship of the Congress of Industrial Organizations (CIO) with both employers and the national government. Both the CIO and the larger American Federation of Labor (AFL) grew rapidly in the war years. Nearly all the unions that belonged to the CIO were fully supportive of both the war effort and of the Roosevelt administration. However, the United Mine Workers, who had taken an isolationist stand in the years leading up to the war and had opposed Roosevelt's reelection in 1940, left the CIO in 1942. The major unions supported a wartime no-strike pledge that aimed to eliminate not only major strikes for new contracts but also the innumerable small strikes called by shop stewards and local union leadership to protest particular grievances. In return for labor's no-strike pledge, the government offered arbitration to determine the wages and other terms of new contracts. Those procedures produced modest wage increases during the first few years of the war but not enough to keep up with inflation, particularly when combined with the slowness of the arbitration machinery. Even though the complaints from union members about the no-strike pledge became louder and more bitter, the CIO did not abandon it. The Mine Workers, by contrast, who did not belong to either the AFL or the CIO for much of the war, threatened numerous strikes including a successful twelve-day strike in 1943. The strikes and threats made mine leader John L. Lewis a much-hated man and led to legislation hostile to unions. All the major unions