Volume 19 contains articles and documents Marx and Engels wrote between January 1861 and June 1864. Many articles, written for the New York Daily Tribune and the Viennese newspaper Die Presse, deal with the US Civil War and as a whole contain the first-ever scholarly assessment of the war as a progressive turning point in the history of the United States. Marx regarded the US Civil War as a form of bourgeois-democratic revolution and in this connection made a thorough analysis of socio-political and economic relations in the United States. Engels studied the implications of the war in the context of historical materialism and discussed the forms and methods of warfare applied in individual operations. Many articles are concerned with economic problems, the home and foreign policy of the European powers, colonialism and the working class and national liberation movements. The appendices include Marx’s application for the restoration of his Prussian citizenship, made in 1861 in connection with the rise of the working-class movement in Germany, and his explanatory statements on the citizenship question.