Considering Rudolph's energetic character, one can assume that he intended to use the conflict between Henry VII and Frederick II to expand his own power and aim for an independent position.

They met Margrave Herman V of Baden was also present, as was Eberhard, Sénéchal of Waldburg and councillor and former guardian of Henry VII in Oppenheim on 5 April 1227 and in Hagenau on 1 May.

On 22 November 1231, Rudolph II and his brother William met Counts Albert of Rottenburg, Ulrich of Hefenstein and Eberhard of Walpurg at Henry VII's castle in Ulm.

[1] In 1235, Pope Gregory IX called on the princes of the empire to organize a new crusade into the Holy Land, to render assistance to the beleaguered church there.

However, a deed in favour of Bebenhausen Abbey which the papal legate made at Rudolph II's request in the army camp outside Ulm on 28 January 1247, suggests that he supported Henry Raspe.