Question

The Pierce administration's secret scheme to gain control of Cuba was stopped when * 1 point Spain threatened a preemptive war against the United States. the secret Ostend Manifesto was leaked to the public. United States leaders signed the Clayton-Bulwer Treaty. Spain declared that it would abolish slavery in Cuba. United States adventurers bungled their invasion.

Answer 1

2. The secret Ostend Manifesto was leaked to the public

Step-by-step explanation:

The Ostend Manifesto was a secret plan to gain control of Cuba and make it a slave state. It was signed by American ministers to Spain (Pierre Soulé), France (John Y. Mason), and Britain (James Buchanan). The idea was to propose the purchase of the Island, and if Spain refused to sell, to launch an invasion and take control of it.

Pierre Soulé was not very secretive about the plan, and it soon became known in both Europe and America. The former President Franklin Pierce finally revealed the manifesto, and it received criticism from the Northern States and form Europe.

This event is considered one of the leading causes of the American Civil War.