1869:
March and April, Engels learns Dutch and Frisian languages.

July 1, Engels leaves Manchester Firm and devotes himself completely to party work and to scientific and journalistic pursuits.

July 28, Engels writes a short biography of Marx and publishes it in "Die Zukunft" in August, in a supplement to "Demokratisches Wochenblatt".

August 7-9, Inaugural Congress of Social Democratic Workers' Party takes place in Eisenach, Germany.

Sept. 6-11, Basle Congress of International Working Men's Association

Sept. 6-23, Engels, Lizzie Burns and Marx' youngest daughter, Eleanor, visit Ireland.

Dec. 1869 to July 1870, Engels works on his "History of Ireland". Of the projected four chapters, he wrote only the first and part of the second. Franco-Prussian War, Paris Commune and his involvement in the work of International, prevented him from finishing his project.


1870:
July 19, Outbreak of Franco-Prussian War

July 19-23, On the General Council's instructions, Marx writes "First Address of the General Council of the International Working Men's Association on Franco-Prussian War". He shows the true character of the war and calls on German workers to prevent the war against Bonapartist France from turning into a war against French people.

July 29 to Feb. 18, 1871, On Marx' advice, Engels writes 59 articles on Franco-Prussian War for "Pall Mall Gazette".

Sept. 1-2, Battle of Sedan culminates in the defeat of French army.

Sept. 4, Following French defeat in Sedan, a revolution breaks out in Paris, resulting in the downfall of Second Empire and proclaiming French Republic.

Sept. 7, Marx writes "Second Address of General Council of International Working Men's Association on Franco-Prussian War". He uses Material on Alsace and Lorraine, sent him by Engels.

Sept. 20, Engels and his wife move from Manchester to London and settle not far from Marx'.

Oct. 4, Engels is unanimously elected member of General Council of International Association. He is appointed Corresponding Secretary for Belgium, Italy, spain, Portugal and Denmark.

Karl Marx