Complex sentence: In 1902, the United States handed over control to a Cuban government that as a condition of the transfer had included in its constitution provisions implementing the requirements of the Platt Amendment, which among other things gave the United States the right to intervene militarily in Cuba.
Split into simpler sentences: In 1902, the United States handed over control to a Cuban government. As a condition of the transfer, the Cuban state had included in its constitution provisions implementing the requirements of the Platt Amendment, which among other things gave the United States the right to intervene militarily in Cuba.