Munitions of War Act 1915

The Munitions of War Act 1915 was a British Act of Parliament promulgated during the First World War which brought private companies supplying the armed forces under the tight control of the newly created Ministry of Munitions, regulating wages, hours and employment conditions. It was a penal offence for a worker to leave his current job at such a "Controlled Establishment" without the consent of his employer, which in practice was "almost impossible" to obtain. The Clyde Workers' Committee was established to oppose the Act.

The Munitions Act followed the Shell Crisis of 1915 when supplies of material to the front became a political issue.