Thereafter, the ship became involved in interventions in several Central American countries, including the United States occupation of Veracruz during the Mexican Revolution, where two of her crew earned the Medal of Honor.

During the United States' participation in World War I from April 1917 to November 1918, Vermont served as a training ship for engine room personnel.

The Connecticut class followed the Virginia-class battleships, but corrected some of the most significant deficiencies in the earlier design, most notably the superposed arrangement of the main and some of the secondary guns.

Despite the improvements, the ships were rendered obsolescent by the revolutionary British battleship HMS Dreadnought, completed before most of the members of the Connecticut class.

As was standard for capital ships of the period, Vermont carried four 21 inch (533 mm) torpedo tubes, submerged in her hull on the broadside.

[3] On 30 November, the ship left Boston to begin preparations to join the world cruise of the Great White Fleet.

The press in both countries began to call for war, and Roosevelt hoped to use the demonstration of naval might to deter Japanese aggression.

The ship arrived in Hampton Roads on 8 December, where she joined the rest of the Great White Fleet, which was commanded by Rear Admiral Robley D. Evans.

[6] After leaving Australia, the fleet turned north for the Philippines, stopping in Manila, before continuing on to Japan where a welcoming ceremony was held in Yokohama.

The ships then crossed the Atlantic to return to Hampton Roads on 22 February 1909, having traveled 46,729 nautical miles (86,542 km; 53,775 mi).

[3] Vermont returned to the Boston Navy Yard for repairs after the ceremonies at Hampton Roads concluded; the work lasted from 9 March to 23 June.

Additional training exercises followed through the end of the year, interrupted only by visits to New York City and to Stamford, Connecticut, for the Hudson–Fulton Celebration and Columbus Day, respectively.

She and several other ships from the Atlantic Fleet then visited New York before some minor repairs were effected at the Philadelphia Navy Yard.

A brief stop at Hampton Roads, where she carried target materials, followed on 8 April, though she left later that day for another period in the Philadelphia Navy Yard for repairs.

Later in the year, she moved south to Tangier Sound and the Virginia Capes for gunnery experiments and target practice.

Vermont was back in the Norfolk Navy Yard on 25 December, after which she departed for the normal winter training period in Cuban waters.

[3] On 12 February, the ship departed for Mexico, as the country was in the midst of the Mexican Revolution; Vermont was tasked with protecting American interests in Veracruz.

She rejoined the fleet in Hampton Roads before beginning a training cruise for midshipmen at the US Naval Academy at Annapolis on 6 June.

[3] After their ship returned to service, Vermont's crew began preparations to perform the normal spring target practice off the Virginia Capes, but the exercises were cancelled when the situation in Mexico worsened.

Vermont contributed twelve officers and 308 men to a landing force that occupied the city to prevent an arms shipment—aboard the steamship Ypiranga—from reaching the dictator Victoriano Huerta.

[3] After returning to the east coast of the United States in late 1914, Vermont resumed her normal routine of training cruises and exercises.

The ship was temporarily placed in reserve from 1 October to 21 November 1916, though after returning to service she supported a Marine expeditionary force sent to Haiti.

Vermont's overhaul was completed on 26 August, and she was assigned as a training ship for engine room personnel, based at Hampton Roads.

The US ambassador to Chile, Joseph Hooker Shea, came aboard the ship on 3 June, and Vermont departed Norfolk that day.

On 5 November, less than a week before the Armistice with Germany ended the fighting in Europe, Vermont was sent to the Philadelphia Navy Yard for conversion into a troop transport.

She began her first transport mission on 9 January 1919; she made another three trips to return American soldiers from France, with the last concluding on 20 June 1919.