following the victory of the united states in the spanish-american war, spain dropped all claims to cuba under the terms of the 1898 treaty of paris. the isla de la juventud was not mentioned in the platt amendment, which defined cuba's boundaries, and this led to competing claims to the island by the united states and the now-independent cuba. in 1907, the u.s. supreme court decided that the island did not belong to the united states. a treaty was signed between the u.s. and cuba in 1925, recognizing cuban ownership.