The British Campaign in the Baltic 1918-19 was apart of the Allied intervention in the Russian Civil War. The purposes of Operation Red Trek were to stop the rise of Bolshevism, protect Britain's interests and to extend the freedom of the seas; its objectives were to aid the establishment of the independent states of Estonia and Latvia and to assist the Russian White forces in taking control of Petrograd.The situation in the Baltic States in the aftermath of World War I was chaotic. The Russian empire had collapsed and Bolshevik Red Army, pro-independence, and pro-German forces were fighting across the region. Riga had been occupied by the German army in 1917 and German Freikorps and Baltic-German Landeswehr units were active in the area. Estonia had established a national army with the support of Finnish volunteers and was defending against the 7th Red Army's attack. A Royal Navy squadron was sent under Rear-Admiral Edwyn Alexander-Sinclair. This force consisted of modern C class cruisers and V and W class destroyers. In December 1918, Sinclair sallied into Estonian and Latvian ports, sending in troops and supplies, and promising to attack the Bolsheviks "as far as my guns can reach". In January 1919 he was succeeded in command by Rear-Admiral Walter Cowan.
Independence was achieved for both Estonia and Latviabut Petrograd fell to the Red Russian Army.