The Joint Chiefs of Staff suggested a full-scale invasion of Cuba. Kennedy did not agree and leaned towards McNamara's favored Naval blockade approach. A blockade was an act of war however, so Kennedy decided to enact a more selective 'quarantine' of Cuba that only applied to offensive weaponry. The term quarantine was also used to avoid comparisons to the Berlin Blockade.The decision to go with a quarantine was made by Kennedy on October 20th at the 505th meeting of the National Security Council. The quarantine was enforced by continuous aerial reconnaissance and promises of retaliatory action if any more missiles made it to the island.