ネーデルラント継承戦争
After the War of Devolution broke out in 1667, he tried to win supporters in Germany for the Spanish cause. On behalf of the Marquis de Castrel Rodrigo, the Spanish governor, he travelled to Berlin to negotiate an alliance against France with Elector Frederick William of Brandenburg. When he appeared to have succeeded, he returned to Brussels. However, Brandenburg entered into an alliance with France in December 1667.