That year, the squadron went to the Mediterranean Sea during the First Balkan War as part of an international blockade of Montenegro.

When the First World War broke out, the 3rd Battle Squadron was assigned to the Grand Fleet, with Dominion conducting operations as part of the Northern Patrol.

The new ships, though based on the general Majestic type that had formed the basis of the preceding four battleship designs, marked the first significant change in the series.

The King Edward VII-class ships were powered by a pair of 4-cylinder triple-expansion engines that drove two screws, with steam provided by sixteen water-tube boilers.

The King Edward VII-class ships had a top speed of 18.5 knots (34.3 km/h; 21.3 mph) from 18,000 indicated horsepower (13,000 kW).

[3] Dominion had a main battery of four 12-inch (305 mm) 40-calibre guns mounted in twin-gun turrets fore and aft.

[3] As was customary for battleships of the period, she was also equipped with five 18-inch (457 mm) torpedo tubes submerged in the hull; two were on each broadside, with the fifth in the stern.

She ran aground in the Gulf of St. Lawrence on 16 August 1906, suffering severe damage to her hull plating and some flooding.

[8] Upon the outbreak of the First World War in August 1914, the 3rd Battle Squadron, at the time under the command of Vice Admiral Edward Bradford, was assigned to the Grand Fleet and based at Rosyth, where it was reinforced with the five Duncan-class battleships,[9][10] It was used to supplement the Grand Fleet's cruisers on the Northern Patrol.

[11] On 6 August, the day after Britain declared war on Germany, elements of the Grand Fleet sortied to inspect the coast of Norway in search of a German naval base violating Norwegian neutrality.

King Edward VII returned on 1 September and resumed her role as flagship, allowing Dominion to leave to have her guns replaced in Devonport.

Four hours later, they met the 1st and 4th Battle Squadrons, en route from Scapa Flow, though they failed to reach the German High Seas Fleet before the latter withdrew.

The Grand Fleet remained at sea until late on 17 December, at which point the 3rd Battle Squadron was ordered back to Rosyth.

[16] Dominion and the rest of the squadron joined the Grand Fleet for another sweep into the North Sea on 25 December.

[18] On 23 January, the 1st and 2nd Battlecruiser Squadrons sortied to ambush the German I Scouting Group in what resulted in the Battle of Dogger Bank the following day.

The 3rd Battle Squadron patrolled the area with the rest of the Grand Fleet over the night before being detached at 08:00 on 25 January to steam to Rosyth.

The fleet went to sea again on 29 May for a patrol south to the Dogger Bank before returning to port on 31 May, again without having located any German vessels.

[21] On 29 April 1916, the 3rd Battle Squadron was rebased at Sheerness, and on 3 May 1916 it was separated from the Grand Fleet, being transferred to the Nore Command.

Dominion remained there with the squadron until March 1918, being attacked unsuccessfully by a German submarine in May 1916 and undergoing a refit at Portsmouth Dockyard in June 1917.