Franz Joseph I of Austria
If Greater Germany was to prevail, the crown would necessarily have to go to Franz Joseph, who had no desire to cede it in the first place to anyone else. On the other hand, if the idea of a smaller Germany won out, the German crown could of course not possibly go the Emperor of Austria, but would naturally be offered to the head of the largest and most powerful German state outside of Austria—the King of Prussia. The contest between the two ideas, quickly developed into a contest between Austria and Prussia. After Prussia decisively won the Seven Weeks War, this question was solved; Austria lost no territories as long as they remained out of German affairs.
Charles Gravier, comte de Vergennes
The objective of Chavigny and Vergennes in Lisbon was to keep Portugal from entering the War of the Austrian Succession on the side of Britain, a task that proved relatively easy as the Portuguese had little interest in joining the war. In 1743 Vergennes accompanied his uncle to the court of Charles VII who was the ruler of Bavaria and also held the title of Holy Roman Emperor. Charles VII was a key ally of the French in the ongoing war against Austria, and they were charged with keeping him in the war by assuaging his concerns which they accomplished successfully. They next were instrumental in the agreement of the Union of Frankfurt, a pact involving several German rulers to uphold Charles VII's interests. after Charles VII's sudden death in 1745, they strove to help his successor Maximilian III but were unable to prevent him from losing his capital at Munich and making peace with the Austrians at the Treaty of Füssen. In November 1745 Chavigny was relieved of his post, and returned to France accompanied by Vergennes. The following year they returned to Portugal to take up their previous posts there where they remained until 1749, unsuccessfully trying to negotiate a commercial treaty.