In May 1920, a Soviet flotilla crossed the Caspian Sea and descended on the Iranian port of Anzali, where a fleet of White Russian warships sat interned under British guard with their guns deliberately disabled. The raid lasted only hours, but its consequences rippled across three empires. The British withdrew from northern Persia, a short-lived socialist republic rose in the forests of Gilan, and the last naval chapter of the Russian Civil War slammed shut on Caspian waters.
The stage was set by a cascade of retreats. After the British Caspian Flotilla was disbanded and the White Russian fleet withdrew south to Anzali, the remaining warships sat idle in the Iranian harbor under British military custody. Every gun had its breechblock removed, rendering the vessels defenseless. Britain maintained a garrison through the North Persian Force, but the strategic calculus was shifting. The White movement was collapsing across Russia, and the Caspian -- once contested between Soviet, British, and White Russian navies -- was becoming a Soviet lake. The British had scored a victory at the Battle of Alexandrovsky Fort, but the Soviets retook the harbor by April 1920. The interned fleet at Anzali represented the last significant White naval asset on the Caspian.
In Moscow, Lenin and Trotsky agreed on an audacious plan. A military strike against Anzali would accomplish two goals simultaneously: recover the warships and military material formerly controlled by White general Anton Denikin, and deal a humiliating blow to British power in northern Persia. The Soviet Caspian Flotilla, commanded by Fyodor Raskolnikov, crossed the sea and struck. The British, outmatched and unwilling to escalate into a broader conflict on Persian territory, sent negotiators on a motor torpedo boat to discuss capitulation terms. The operation succeeded swiftly. Eight hundred Cossacks surrendered to the Soviets and to Persian socialist fighters known as the Jangalis, the jungle rebels of Gilan province.
The most unexpected consequence came on 5 June 1920, when the Persian Socialist Soviet Republic was proclaimed in Gilan. The Jangali movement, led by local revolutionaries who had long opposed both foreign interference and the central Persian government, seized the opportunity created by Britain's withdrawal. The republic proved short-lived, but its establishment demonstrated how rapidly the vacuum left by one empire could be filled by another ideology. For a brief period, Soviet-style governance took root on Iranian soil, a fact that would shape Persian politics and Iranian suspicion of foreign intervention for generations.
The loss stung London badly. The withdrawal of the British garrison, combined with the earlier capture of the British naval mission at Baku by Raskolnikov's forces, provoked alarm in the British Cabinet and in public opinion. On 21 May, the government ordered the transfer of British troops from Persian soil to Iraq, Palestine, and India. Commentators, including the historian Arnold Toynbee, denounced what they saw as a decline of British influence across the Caucasus and Persia. The Anzali Operation had ended not just a naval confrontation but an era of British strategic dominance along the Caspian corridor. What had been a minor port action became a turning point in the Great Game's final chapter.
Bandar-e Anzali sits at 37.47°N, 49.47°E on the southwestern shore of the Caspian Sea in Iran's Gilan Province. The port is visible along the coast with its harbor and lagoon system. Nearest major airport is Rasht Sardar-e Jangal Airport (OIGG), approximately 35 km to the southwest. Best viewed at 5,000-8,000 ft altitude. The Caspian shoreline and the lush green forests of Gilan provide strong visual contrast with the water.