But he had conversed with his brother-in-law on the possibility of advantages which might accrue to France from the weakening of her old foe, if French aid should enable the Americans to establish their independence.

Joseph's opinion was clear and unhesitating: "I am a king; it is my business to be royalist." And he easily convinced Louis that for one sovereign to assist the subjects of another monarch who were in open revolt, was to set a mischievous example which might in time be turned against himself.

But since his return to Vienna, unprecedented disasters had befallen England; a whole army had laid down its arms; the ultimate success of the Americans seemed to every statesman in Europe to be assured, and the prospect gave such encouragement to the war party in the French cabinet that Louis could resist it no longer.

In February, 1778, a treaty was concluded with the United States, as the insurgents called themselves; and France plunged into a war from which she had nothing to gain, which involved her in enormous expenses, which brought on her overwhelming defeats, and which, from its effects upon the troops sent to serve with the American army, who thus became infected with republican principles, had no slight influence in bringing about the calamities which, a few years later, overwhelmed both king and people.
All Marie Antoinette's language on the subject shows that she viewed the quarrel with England with even greater repugnance than her husband; but it is curious to see that her chief fear was lest the war should be waged by land, and that she felt much greater confidence in the French navy than in the army;[3] though it was just at this time that Voltaire was pointing out to his countrymen that England had always enjoyed and always would possess a maritime superiority which different inquirers might attribute to various causes, but which none could deny.[4] Even before the conclusion of this treaty, however, the Americans had found sympathizers in France, to one of whom some of the circumstances of the war which they were now waging gave a subsequent importance to which no talents or virtues of his own entitled him.

The Marquis de La Fayette was a young man of ancient family, and of fair but not excessive fortune.
He was awkward in appearance and manner, gawky, red-haired, and singularly deficient in the accomplishments which were cultivated by other youths of his age and rank.[5] But he was deeply imbued with the doctrines of the new philosophy which saw virtue in the mere fact of resistance to authority; and when the colonists took up arms, he became eager to afford them such aid as he could give.