On January 29, 1952, representatives of the United States and Cuba initiated negotiations for a bilateral military assistance agreement at Habana. Documents pertaining to the negotiations are in Department of State file 737.5 MSP for 1952. The Agreement was signed on March 7, 1952, and entered into force on the same date; for text, see United States Treaties and Other International Agreements (UST), volume 3, page 2901, or Department of State Treaties and Other International Acts Series (TIAS) No. 2467.
Concurrent with the negotiations for the military assistance agreement, representatives of the United States and Cuba conducted negotiations for a supplementary military plan, which was initialed on March 7, 1952, by Ambassador Willard Beaulac and Cuban Minister of State Aureliano Sánchez Arango. The “Plan of the Governments of Cuba and the United States of America for Their Common Defense” was transmitted to the Department of State under cover of despatch 1504, from Habana, dated March 14, 1952, not printed (737.5 MSP/3–1452).