1873 Dominican Republic Samaná Peninsula referendum
A referendum on leasing the Samaná Peninsula to the United States for 99 years was held in the Dominican Republic on 19 February 1873. The proposal was approved by 99.91% of voters, but was never implemented after President Buenaventura Báez was overthrown on 2 January 1874.
Source: Wikipedia — 1873 Dominican Republic Samaná Peninsula referendum (CC BY-SA 4.0)