"Connecticut" then went to Maine and the Virginia Capes, for battle practice, after which she went into the Philadelphia Naval Yard for an overhaul. After more than 15 weeks, "Connecticut" emerged on 15 January 1915, and steamed south to Cuba, where she conducted training exercises. During maneuvers there in March 1915, a chain wrapped around her starboard propeller, breaking the shaft and forcing her return to Philadelphia, for repairs. She remained there until 31 July, when she embarked 433 men from the Second Regiment, First Brigade, of the United States Marine Corps for transport to Port-au-Prince, where they were put ashore on 5 August, as part of the US occupation of Haiti. "Connecticut" delivered supplies to amphibious troops in Cap-Haïtien, on 5 September and remained near Haiti, for the next few months, supporting landing parties ashore, including detachments of Marines and sailors from "Connecticut" under the command of Major Smedley Butler. After departing Haiti, "Connecticut" arrived in Philadelphia, on 15 December, and was placed into the Atlantic Reserve Fleet.