What was the secret memo that urged the acquisition of Cuba by any means necessary?

The Fulbright Memorandum|||The Ostend Manifesto. The Fulbright Memorandum, as the other answerer referred to, was part of the Bay of Pigs invasion. In that operation, the object wasn't actually to take over Cuba, but rather to aid a revolution that would throw out the communists. We had no intention of actually controlling Cuba.|||Ostend Manifesto, 1854. Purchase Cuba from Spain or go to war and take it from Spain