Answer:
/the Seven Years' War/
/financing of the American Revolution/
/lavish spending by the royal court/
Step-by-step explanation:
France's debt grew due mostly to the country´s lengthy engagement in the Seven Years’ War (1756–1763) as well as in the American Revolution (1775–1783). Furthermore, maintaining the army and navy was expensive, but of great importance during that unstable period.
Besides, the cost of maintaining the King Louis XVI’s lavish palace at Versailles and the frivolous spending of his queen, Marie-Antoinette, aggravated an already growing debt.