28 November 1820: FE born at Barmen-Elberfeld, Prussian province of the Rhineland.
August 1838–March 1841: Business training in Bremen.
September 1841–October 1842: Voluntary military service in Berlin; joins group of Young Hegelians (“The Free”).
November 1842: Meets with KM in Cologne office of the Rheinische Zeitung.
December 1842–August 1844: Commercial training at “Ermen & Engels” in Manchester; meets Mary Burns – his companion from Summer 1845.
October–November 1843: Composes the Outlines of a Critique of Political Economy.
November 1843: First mentions KM in print, in the New Moral World newspaper.
February 1844: His Outlines published by KM in Deutsch-Französiche Jahrbücher (first and only number of the journal).
Late August–early September 1844: Second meeting with KM, in Paris; beginning of Marx–Engels collaboration.
September 1844: Returns to Barmen.
September 1844–March 1845: Composes The Condition of the Working Class in England.
April 1845: Joins KM in Brussels (until 1848).
July–August 1845: Visits Manchester with KM.
January 1846: FE and KM found the Communist Correspondence Committee (Brussels).
January 1847: FE and KM invited to join the “League of the Just” (a communist group organized in 1836–8) in Paris.
June 1847: The League reorganized as the League of Communists; London Congress adopts FE's “Draft of a Communist Confession of Faith” as provisional basis of its new program.
December 1847: FE's Principles of Communism accepted as basis of final version of the program; KM asked by Communist League to prepare document for publication.