The British Campaign in the Baltic 1918–19 was a part of the Allied intervention in the Russian Civil War.
 The codename of the Royal Navy campaign was "Operation Red Trek".
 The intervention played a key role in enabling the establishment of the independent states of Estonia and Latvia but failed to secure the control of Petrograd by White Russian forces, which was one of the main goals of the campaign.
The Allied intervention was a multi-national military expedition launched during the Russian Civil War in 1918.
 The initial goals were to help the Czechoslovak Legion, secure supplies of munitions and armaments in Russian ports, and re-establish the Eastern Front.
 After winning World War I, the Allies militarily backed the anti-Bolshevik White forces in Russia.
 Allied efforts were hampered by divided objectives, war-weariness after they just finished greater conflict, and a lack of domestic support.
 These factors, together with the evacuation of the Czechoslovak Legion, compelled the Allies to withdraw from North Russia and Siberia in 1920, though Japanese forces occupied parts of Siberia until 1922 and the northern half of Sakhalin until 1925.
HMS "Caradoc" was a C-class light cruiser built for the Royal Navy during World War I.
 She was one of the four ships of the "Caledon" sub-class.
 Assigned to the Grand Fleet during the war, the ship participated in the Second Battle of Heligoland Bight in late 1917.
 "Caradoc" was briefly deployed to the Baltic in late 1918 supporting anti-Bolshevik forces during the British campaign in the Baltic and then was transferred to the Mediterranean Fleet in early 1919 and spent the next year and a half doing the same thing in the Black Sea during the Russian Civil War.
 The ship was withdrawn from the Black Sea in mid-1920 to observe the Greco-Turkish War of 1919–22 and the Chanak Crisis of late 1922.
 "Caradoc" spent most of the rest of her time between the World Wars overseas or in reserve with deployments to the Far East and the North America and West Indies Station.
Captain John Alfred Moreton, CMG, DSO, Royal Navy was an officer of the Royal Navy active in the First World War.
 Promoted to Captain on 1 January 1916 he commanded the monitors "General Wolfe" and "Erebus".
 He took a leading rôle in the British Campaign in the Baltic 1918-19 as part of the Allied intervention in the Russian Civil War.
 For a short period of time in November, 1919 he was Military Governor of the Latvian city of Riga.
The North Russia Intervention, also known as the Northern Russian Expedition, the Archangel Campaign, and the Murman Deployment, was part of the Allied Intervention in Russia after the October Revolution.
 The intervention brought about the involvement of foreign troops in the Russian Civil War on the side of the White movement.
 While the movement was ultimately defeated, the Allied forces fought notable ending defensive actions against the Bolsheviks in the battles of Bolshie Ozerki, allowing them to withdraw from Russia in good order.
 The campaign lasted from 1918, during the final months of World War I, to 1920.
HMS "Curacoa" was a C-class light cruiser built for the Royal Navy during the First World War.
 She was one of the five ships of the "Ceres" sub-class and spent much of her career as a flagship.
 The ship was assigned to the Harwich Force during the war, but saw little action as she was completed less than a year before the war ended.
 Briefly assigned to the Atlantic Fleet in early 1919, "Curacoa" was deployed to the Baltic in May to support anti-Bolshevik forces during the British campaign in the Baltic during the Russian Civil War.
 Shortly thereafter the ship struck a naval mine and had to return home for repairs.
The Battle of Bolshie Ozerki was a major engagement fought during the Allied intervention in the Russian Civil War.
 Beginning on March 31, 1919, a force of British, American, Polish, and White Russian troops engaged several Red Army partisan regiments at the village of Bolshie Ozerki.
 Although the initial Allied attacks were repelled, the outnumbered Allies managed to repel the Soviet flanking attempts that followed and the Red Army was later ordered to withdraw.
 The battle was the last engagement of the intervention to involve British forces.
 It was also one of the last significant engagements of the intervention to involve American forces, though they successfully defended their camp from a Russian attack at Romanovka composed of forces that greatly outnumbered them two months later and inflicted hundreds of casualties during the Suchan Valley Campaign the following month.
 Allied forces began to withdraw rapidly from northern Russia shortly thereafter.
The "Orfey"-class destroyers were built for the Baltic Fleet of the Imperial Russian Navy.
 They were modified versions of the earlier destroyer "Novik" and the "Derzky" class .
 These ships were larger, had triple torpedo tubes and an extra 102 mm gun.
 One ship, Engels, was tested fitted with a 305mm recoilless rifle for testing in 1934.
 Fourteen ships were completed in 1914 - 1917 and fought in World War I and during the Allied intervention in the Russian Civil War.
 The survivors fought in World War II.
Andrei Pervozvanny (Russian: Андрей Первозванный —St Andrew the First-Called) was an "Andrei Pervozvanny"-class predreadnought battleship built for the Imperial Russian Navy during the mid-1900s.
 The ship's construction was seriously extended by design changes as a result of the Russo-Japanese War and labor unrest after the 1905 Revolution, and she took nearly six years to build.
 "Andrei Pervozvanny" was not very active during World War I and her bored sailors joined the general mutiny of the Baltic Fleet in early 1917.
 She was used by the Bolsheviks to bombard the rebellious garrison of Fort Krasnaya Gorka during the Russian Civil War in 1919 and was torpedoed by British Coastal Motor Boats shortly afterwards, as part of the allied intervention in the Russian Civil War.
 The ship was never fully repaired and was scrapped in 1923.
The 5/42 Evzone Regiment "Delvinaki" (Greek: 5/42 Σύνταγμα Ευζώνων «Δελβινάκι», 5/42 ΣΕ ) is an active infantry unit of the Hellenic Army.
 It was established as an elite regiment of Evzones, recruited in Central Greece and headquartered in Lamia, in 1913.
 The unit served in the Macedonian Front of World War I, the Allied intervention in the Russian Civil War, the Greco-Turkish War of 1919–1922, and the Greco-Italian War during World War II.
 Reformed as the 53rd Brigade (53η Ταξιαρχία) in 1948, it participated in the Greek Civil War, before receiving the designation 5/42 Infantry Regiment (5/42 Σύνταγμα Πεζικού, 5/42 ΣΠ) in 1949.
 The regiment was disbanded in 1954, but revived as a reserve formation in 1979, under its original name.
 In November 2000 it received the honorific title "Delvinaki".
 Since January 2003 it forms the garrison of the Dodecanese island of Kalymnos.

Question: What year where both Allied intervention in the Russian Civil War and British campaign in the Baltic?
Answer: 1918