In 1778, Beaumarchais' hopes were fulfilled when French government agreed the Treaty of Alliance and entered the American War of Independence followed by Spain in 1779 and the Dutch Republic in 1780.
Beaumarchais' hopes were fulfilled. This was in 1778. French government agreed the Treaty of Alliance. French government entered the American War of Independence. This Independence was followed by Spain in 1779. This Independence was followed by the Dutch Republic in 1780.