From mid-1919 to mid-1921, "Arkansas" and "Wyoming" served in the Pacific Fleet, with the latter serving as the flagship of BatDiv 6. During this time, the ships made a tour of Central and South American countries, culminating in a visit to Valparaiso, where they took part in a naval review for the Chilean president. Both battleships returned in service with the Atlantic Fleet in mid-1921. They returned to their peacetime routine of training and maneuvers and periodic maintenance. In the summers, the ships would generally take midshipmen from the US Naval Academy on training cruises. In June 1925, "Arkansas" assisted relief efforts after the 1925 Santa Barbara earthquake. From late 1925 to late 1926, "Arkansas" received her reconstruction, followed by "Wyoming" in 1927. In 1929 and 1930, "Arkansas" visited European waters on midshipmen cruises; she made stops in several countries. "Wyoming" was reduced to a training ship in 1931 in accordance with the London Naval Treaty, and she spent the next decade conducting training cruises for midshipmen and NROTC cadets.