Troubridge was promoted to the rank of commander in 1895, serving with the Mediterranean Fleet aboard the flagship of the fleet's second in command, HMS Revenge, initially Rear-Admiral Sir Robert Harris, and later Rear-Admiral Sir Gerard Noel.
He was promoted to captain 17 July 1901 and went on to serve as a naval attaché to several powers, based at first in Vienna, and from 1902 in Madrid.
He became a naval attaché in Tokyo later in 1902, and served as such until 1904.
With the outbreak of the Russo-Japanese War he went to sea with the Japanese warships and was present at the Battle of Chemulpo Bay and the subsequent operations off Port Arthur.
After the conclusion of the war Troubridge was awarded the Order of the Rising Sun by the Japanese, while the British government appointed him a Companion of the Order of St Michael and St George and a Member of the Royal Victorian Order.
He took command of the battleship HMS Queen, serving as flag captain to the commander of the Mediterranean Fleet, Admiral Sir Charles Drury.

After the expiration of this posting Troubridge spent the years between 1908 and 1910 as commodore commanding the royal naval barracks at Chatham, and in 1910 became Private Naval Secretary to the First Lord of the Admiralty.
Until 1911 this was Reginald McKenna, who was succeeded that year by Winston Churchill.
Troubridge was promoted to flag rank in March 1911 with his promotion to rear-admiral, and in 1912 he became chief of the War Staff.
During his time on the War Staff he was involved in the drawing up of plans for naval strategy in the event of war.
The plans, which involved the establishment of a massive cordon of warships in British waters, provoked criticism from a number of naval officers, and were eventually shown to be unsound in a series of naval exercises and manoeuvres in the summer of 1912.
Churchill arranged for Troubridge to leave office at the end of the year, replacing him with Vice-Admiral Sir Henry Jackson.
Troubridge returned to active service at sea in January 1913 with his appointment to command the Mediterranean Fleet's cruiser squadron, consisting of HMS Defence, HMS Black Prince, HMS Duke of Edinburgh and HMS Warrior, under the fleet's commander-in-chief, Admiral Sir Berkeley Milne.
During this period Troubridge flew his flag aboard Defence.
Troubridge was promoted to the rank of commander in 1895, serving with the Mediterranean Fleet aboard the flagship of the fleet's second in command, HMS Revenge, initially Rear-Admiral Sir Robert Harris, and later Rear-Admiral Sir Gerard Noel. He was promoted to captain 17 July 1901 and went on to serve as a naval attaché to several powers, based at first in Vienna, and from 1902 in Madrid. He became a naval attaché in Tokyo later in 1902, and served as such until 1904. With the outbreak of the Russo-Japanese War he went to sea with the Japanese warships and was present at the Battle of Chemulpo Bay and the subsequent operations off Port Arthur. After the conclusion of the war Troubridge was awarded the Order of the Rising Sun by the Japanese, while the British government appointed him a Companion of the Order of St Michael and St George and a Member of the Royal Victorian Order. He took command of the battleship HMS Queen, serving as flag captain to the commander of the Mediterranean Fleet, Admiral Sir Charles Drury.
After the expiration of this posting Troubridge spent the years between 1908 and 1910 as commodore commanding the royal naval barracks at Chatham, and in 1910 became Private Naval Secretary to the First Lord of the Admiralty. Until 1911 this was Reginald McKenna, who was succeeded that year by Winston Churchill. Troubridge was promoted to flag rank in March 1911 with his promotion to rear-admiral, and in 1912 he became chief of the War Staff. During his time on the War Staff he was involved in the drawing up of plans for naval strategy in the event of war. The plans, which involved the establishment of a massive cordon of warships in British waters, provoked criticism from a number of naval officers, and were eventually shown to be unsound in a series of naval exercises and manoeuvres in the summer of 1912. Churchill arranged for Troubridge to leave office at the end of the year, replacing him with Vice-Admiral Sir Henry Jackson. Troubridge returned to active service at sea in January 1913 with his appointment to command the Mediterranean Fleet's cruiser squadron, consisting of HMS Defence, HMS Black Prince, HMS Duke of Edinburgh and HMS Warrior, under the fleet's commander-in-chief, Admiral Sir Berkeley Milne. During this period Troubridge flew his flag aboard Defence.
Ernest Troubridge