main opponents were the brother of the imperial duke Albert VI of Austria, Frederick of the Palatinate and Duke Louis IX of Bavaria. In 1460 the first military encounters between the two groups occurred. After a short armistice, Frederick III once more proclaimed imperial war against Bavaria the following year. Together with Albrecht Achilles, Ulrich assumed leadership of the imperial forces against Bavaria. In the Mainz Diocesan Feud of 1461 to 1463, which broke out shortly after, he supported Archbishop Adolf II of Nassau against his deposed predecessor Diether von Isenburg and Frederick I of the Palatinate. After skirmishes, on 30 June 1462 a battle took place near Seckenheim, and Ulrich and his allies were defeated. They were taken captive by the Palatinate forces. Only on 27 April 1463 was Ulrich able to return to Stuttgart after payment of a ransom. In 1473 went Ulrich and Eberhard V a house contract one which should regulate the common hereditary result and aspire to the reunion of both württembergian land parts. Ulrich received later with Eberhard V also support against his own renitenten son, Eberhard VI, by which Eberhard V also influence in the Stuttgart land part won. Family and children He was married three times: First, he married in Stuttgart 29 January 1441 to Margaret of Cleves, daughter of Duke Adolf I of Cleves and Mary of Burgundy. They had one daughter: Katharina (7 December 1441 – 28 June 1497, Würzburg), a nun in Laufen. Second, he married in Stuttgart 8 February 1445 to Elisabeth of Bavaria-Landshut, daughter of Henry XVI of Bavaria and Margarete of Austria. They had five children: Margareta (ca. 1446 – 21 July 1479, Worms), a nun in Liebenau monastery. Duke Eberhard II (1 February 1447, Waiblingen – 17 February 1504, Castle Lindenfels, Odenwald). Henry (7 September 1448 – 15 April 1519), Count of Montbéliard. Ulrich (ca. 1449 – died young). Elisabeth (23 December 1450, Landshut – 6 April 1501), married in Münnerstadt 13 September 1469 to Count Friedrich II of Henneberg. Third, he married in Stuttgart 11 November 1453 to Margaret of Savoy, daughter of Duke Amadeus VIII of Savoy and Mary of Burgundy. They had three daughters: Margarete (ca. 1454 – 21 April 1470), married 23 April 1469 to Count Philipp I of Eppstein-Königstein. Philippine (ca. 1456 – 4 June 1475, Weert), married 22 April/4 June 1470 to Count Jakob II of Horn. Helene (ca.