Final answer:
During John Adams' presidency, France and Britain seized US ships, which led to the Quasi-War.
Step-by-step explanation:
During the presidency of John Adams, both France and Britain seized US ships. The French declared war on Britain and targeted American ships carrying British goods. Between 1797 and 1799, France seized 834 American ships. This undeclared war between France and the United States is referred to as the Quasi-War.