In 1732, Queen Sophia Dorothea tried to arrange a dual marriage of Frederick and his sister Wilhelmina with Amelia and Frederick, the children of her brother, King George II of Great Britain. Fearing an alliance between Prussia and Great Britain, Field Marshal von Seckendorff, the Austrian ambassador in Berlin, bribed Field Marshal von Grumbkow, the Prussian Minister of War, and Benjamin Reichenbach, Prussian ambassador in London. They pair discreetly slandered the British and Prussian courts in the eyes of the two kings. Angered by the idea of the marriage Frederick William made impossible demands to the British, such as Prussia acquiring Jülich and Berg, leading to the collapse of the marriage proposal.