Georgs Karriere begann erst nach dem Aufstieg seiner Gattin Anne Stuart zur Königin von England, Schottland und Irland im Jahr 1702: "When all the first necessary formalities had been completed, Anne was able to fulfil her dearest wish; to wave her wand like a fairy queen, and make the Prince, her dear George, Generalissimo of the Forces on land and Lord High Admiral of the Fleet. Probably nothing in Anne's life gave her so much satisfaction as this. Amidst the initial drudgery of sovereignty it was her first sweet taste of power. But it was something much more than that: not only could she show the world at last that her husband was the finest man in all the realm, but her affectionate heart was trying to recompense him for his fidelity and love, and all the slights he had endured so uncomplaining for her sake since he first came to England. It mattered not in the least that he was totally incompetent to fill either post. ... But when she desired that her husband should be given equal rank to her own, this was found to be unconstitutional, and the sensible George himself quietly set the idea aside." (in: Marie Ruan Hopkinson: Anne of England – The Biography of a great Queen, id., p. 175).
aber: "On his return to The Hague Marlborough again pressed the matter which Anne had so earnestly and insistently urged upon him before he left England, in regard to the nomination of Prince George to the Chief Command of the Allied Armies. The Allies, however, being quite determined that this should not be agreed to, put an end to the matter by offering the command to Marlborough himself with a salary of £10,000 a year. The disappointment of her husband was very hard for Anne to bear, and for once in his life this kindly man showed bitterness and a suspicion of Marlborough's integrity. But there was no word of censure from Anne, whose good sense had come to her aid by this time ..." (in: Marie Ruan Hopkinson: Anne of England – The Biography of a great Queen, id., p. 190).