Editing 1142 (section)

==== Europe ====
* King [[Louis VII of France|Louis VII]] the Younger of France becomes involved in a civil war with [[Theobald II, Count of Champagne|Theobald II]] ("the Great"), count of [[County of Champagne|Champagne]], by permitting his cousin [[Ralph I, Count of Vermandois|Ralph I of Vermandois]] (''[[seneschal]]'' of [[France in the Middle Ages|France]]) to repudiate his wife, Theobald's sister [[Eleanor of Champagne]], and to marry [[Petronilla of Aquitaine]], who was the sister of King Louis VII’s wife, Queen [[Eleanor of Aquitaine]].
* [[Sigurd II of Norway|Sigurd II]], a Norwegian pretender, is joined in his efforts to overthrow the 7-year-old King [[Inge I of Norway|Inge Haraldsson]] of Norway by Inge's older half-brother [[Eystein II of Norway|Eystein II]], who becomes co-ruler. He receives one third of the late [[Harald Gille|Harald]]'s kingdom.
* May &ndash; Conrad III makes a peace agreement with the 13-year-old [[Henry the Lion]] at [[Frankfurt]]. He is appointed as duke of [[Duchy of Saxony|Saxony]], which territories are deprived from his father, the late Duke [[Henry X, Duke of Bavaria|Henry the Proud]].<ref>Emmerson, Richard K. (2013). ''Key Figures in Medieval Europe'', p. 320. {{ISBN|978-1-136-77518-5}}.</ref>
* Duke [[Władysław II the Exile]] attempts to subject his younger (half)-brothers to re-unite [[Kingdom of Poland (1025–1385)|Poland]]. He is supported by the alliances with the [[Kievan Rus']] and the [[Holy Roman Empire]]. 
* Summer &ndash; [[Conrad III of Germany|Conrad III]] enters [[Duchy of Bohemia|Bohemia]] to reinstate his brother-in-law [[Vladislaus II, Duke and King of Bohemia|Vladislaus II]] as duke, whose half-sister [[Gertrude of Babenberg, Duchess of Bohemia|Gertrude of Babenberg]] he is married. Conrad lays siege to the [[Prague Castle]].
* [[Siege of Lisbon (1142)]]: King [[Afonso I Henriques]] of [[Portugal]] attempts to besiege Lisbon with the aid of a group of Anglo-Norman crusaders.<ref>{{cite journal | author=Lucas Villegas-Aristizábal | title=Revisiting the Anglo-Norman Crusaders' Failed Attempt to Conquer Lisbon c. 1142 | journal=Portuguese Studies | volume=29 | issue=1 | date=2013 | doi=10.5699/portstudies.29.1.0007 | page=7}}</ref>