In the shipyards in and around Glasgow, Scotland, opposition to the British war effort became a major aim during the Red Clydeside era. To mobilize the workers of Clydeside against World War I, the Clyde Workers' Committee (CWC) was formed, with Willie Gallacher as its head and David Kirkwood its treasurer. The CWC led the campaign against the Liberal government of David Lloyd George and their Munitions Act, which forbade engineers from leaving the company they were employed in. The CWC negotiated with government leaders, but no agreement could be reached and consequently both Gallacher and Kirkwood were arrested and imprisoned under the Defence of the Realm Act.