The Platt Amendment made Cuba a US protectorate (a country under the control and protection of another country).After Cuba accepted the Platt Amendment, US troops withdrew. The Amendment was eventually repealed, but the United States retained its lease on the naval base at Guantanamo Bay.onfidence votes 39. The Platt Amendment made Cuba a US protectorate (a country under the control and protection of another country). After Cuba accepted the Platt Amendment, US troops withdrew.