In the period prior to World War I, "Chester" operations included training activities off the East Coast and in the Caribbean, participation in the Fleet Reviews of February 1909, October 1912, and May 1915, and many duties of a diplomatic nature. She carried a Congressional committee on a tour of North Africa in 1909, and the next year, joined in a special South American cruise commemorating the 100th anniversary of the first autonomous government of Buenos Aires, Argentina. As American interests in the Caribbean were threatened by internal political changes in several nations, "Chester" patrolled off Mexico, Santo Domingo, and Haiti, and transported a Marine occupation force in 1911. Later that year, she carried men and stores to the steam patrol yacht , station ship at the then-Austrian port of Trieste, returning to Boston with the American consul at Tripoli.