Nikolai Ottovich von^{[lower-alpha 1]} Essen (Russian: Николай Оттович Эссен, tr. Nikolay Ottovich Essen; 23 December [O.S. 11] 1860 – 20 May [O.S. 7] 1915) was a Russian naval commander and admiral descended from the Baltic German noble Essen family. For more than two centuries, his ancestors had served in the Imperial Russian Navy, and seven had been awarded the Order of St. George, the highest military award of the Russian Empire. Essen was regarded ^[1] as one of the most prominent admirals of the Russian naval force during World War I (1914–1918).

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Nikolai Ottovich von Essen
Николай Оттович фон Эссен
Admiral Nikolai Ottovich von Essen.
Commander of the Imperial Baltic Fleet
In office 3 December [O.S. 21 November] 1909 – 7 May [O.S. 25 April] 1915
Monarch	Nicholas II
Prime Minister	Pyotr Stolypin Vladimir Kokovtsov Ivan Goremykin
Preceded by	position established
Succeeded by	Vasily Kanin
Personal details
Born	11 December [O.S. 29 November] 1860 Saint Petersburg, Russian Empire
Died	7 May [O.S. 25 April] 1915 (aged 54) Reval, Governorate of Estonia, Russian Empire
Resting place	Novodevichy Cemetery
Military service
Allegiance	Russian Empire
Branch/service	Imperial Russian Navy
Years of service	1880–1915
Rank	Admiral
Commands	Cruiser Novik Battleship Sevastopol Cruiser Rurik Imperial Baltic Fleet
Battles/wars	Russo-Japanese War World War I

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Nikolai Ottovich von Essen was born on 23 December [O.S. 11] 1860 in St. Petersburg, Russia, to Imperial Senator Otto Wilhelm von Essen, into the wealthy noble family of Essen. Early on in his life, Essen received home education; he was well-educated and fluent in English, French, Russian, and his native German.^[2] He graduated from the Naval Cadet Corps in 1880, after a two-year foreign cruise, attended the engineering department of the Nikolayev Naval Academy from 1883 to 1886. He was commissioned as a lieutenant in 1891 and served with the Russian Pacific Fleet from 1892 to 1896, and with the Russian Mediterranean Squadron from 1897.^[3]

In the early part of his career, he commanded Minesweeper No. 120 (1897–98), the gunboat Grozyachiy (1898–1900), and the steamship Slavianka (1901–1902) in the Black Sea. After a brief assignment as an instructor at the Naval Cadet Corps, he was appointed captain of the cruiser Novik (1902–1904), which was stationed at Vladivostok.^[3]

At the start of the Russo-Japanese War, Admiral Stepan Makarov reassigned Essen to command the battleship Sevastopol at Port Arthur. After the Battle of the Yellow Sea, Essen also commanded the land-based defences at the entrance to Port Arthur. During the last weeks of the Japanese siege, he moved Sevastopol out of the relative safety of the inner harbour to use her firepower to help repulse repeated Japanese attacks. However, on hearing of the surrender of Port Arthur, he moved Sevastopol into deeper water and then scuttled her, making her the only battleship that the Imperial Japanese Navy could not raise after the war. He was sent as a prisoner of war to Japan, but was paroled after less than two months, and returned to St Petersburg to a hero's welcome. For his actions, Essen was awarded the Order of St. George (3rd degree) and promoted to captain.^[3]

After the end of the war, Essen became the first captain of the British-built armoured cruiser Rurik. He was promoted to rear admiral in 1908 and appointed commander-in-chief of the Russian Baltic Fleet in 1909 when this position was created. He was promoted to admiral in 1913. Essen, from lessons learned in the war against Japan and the mutiny of the Black Sea Fleet, urged far-reaching reforms and modernisation of the Imperial Russian Navy. He recognised early the importance of submarines and aircraft, and sought to promote younger officers based on their knowledge of modern strategy and tactics, also establishing a naval training academy at Kronstadt. Above all, he pushed for the operational autonomy of the Baltic Fleet.

Widely regarded as the most able of Russian admirals in World War I, Essen led the Baltic Fleet energetically during the first year of the war. His forces at the time consisted of four battleships, five cruisers, four light cruisers, 62 torpedo boats, 12 submarines and numerous smaller and specialised units. His superiors preferred a cautious defensive position in the Baltic Sea, forcing Essen to concentrate his forces in the Gulf of Finland to protect Petrograd, with older units in the Gulf of Riga, and effectively abandoning Liepāja to the Germans. Nevertheless, on 9 August 1914, Essen led part of his fleet towards Gotland with the intent to contain the Swedish navy and deliver a note of his own making which would have violated Swedish neutrality and may have brought Sweden into the war. He was ordered back before his plan could be executed. However, on 27 August 1914, he assigned Rurik and Pallada to commerce raiding operations in the Baltic. Although of little success, the mission went a long way towards maintaining morale within the Baltic Fleet.

Essen died unexpectedly after a short bout of pneumonia in May 1915. He is buried in the Novodevichy Cemetery (Saint Petersburg). He was survived by his wife, Mary, and son Anthony (who was later killed^[4] in action as commander of the submarine AG-14 on 24 October 1917), and two daughters who married naval officers.

• Golden Sword for Bravery (14 March 1904)
• Order of St. George (4th class), (17 April 1905)
• Order of the White Eagle with Swords (12 December 1914)

The second ship of the Admiral Grigorovich class of frigates is named Admiral Essen to commemorate the admiral.