 The fleet arrived on 19 June, disembarked the marines, and then remained in Guantanamo Bay until conditions in the country improved, allowing the fleet to leave for training.Fleet and division maneuvers began on 10 July off the coast of Rhode Island and Connecticut and on 1 August, "Mississippi" went to Philadelphia, where she was placed in reserve.She remained in the Atlantic Reserve Fleet until 30 December 1913, when she was sent to Pensacola, Florida for use as a support ship for the creation of the Naval Air Station Pensacola.