The next possibility was to exert all possible diplomatic, economic, psychological, and other pressures to overthrow the Castro-Communist regime without overt employment of U.S. military. Another possibility was to help the Cubans overthrow the Castro-Communist regime with a step-by-step phase to ensure success including the use of military force if required. The last possibility was to use a provocation and overthrow the Castro-Communist regime by U.S. military force.[42] In his July review, Lansdale recommended a more aggressive short-term plan of action.