1911 Russian invasion of Tabriz

Russian invasion of Tabriz (1911) refers to the attack and invasion of the city of Tabriz in the north western part of Iran in December 1911 by Imperial Russia. The Russian invasion began an occupation which continued into the course of World War I. This occupation was in retaliation for the Iranian Parliament's refusal to accept the Russian ultimatum. The Russian Ultimatum had three major demands for the Iranian government, amongst which the most important was to fire the newly employed American lawyer Morgan Shuster. Shuster had been hired by the Parliament of Iran to organise the country's financial affairs. Upon the Iranian parliament's refusal to fire Shuster, the Iranian government dissolved the parliament and agreed to the Russian ultimatum. Nevertheless, the Russian Imperial Army invaded northwestern Iran. Its aim was to occupy three major cities: Tabriz, Anzali and Rasht. The most fierce battle of the Russian invasion occurred in Tabriz, where the constitutionalists resisted. After about three days, the defense of the city's residents broke. The Russians shelled Tabriz with artillery and entered the city.

The Russians executed the constitutional revolutionaries of Tabriz and their relatives en masse and many civilians of Tabriz as well. The total number of executions is estimated to have been about 1,200. Russians also destroyed part of the Arg of Tabriz by shelling it. Fire broke out in the Arg while it was held by Russian troops.

As a result of the campaign, Tabriz was re-occupied by the Russians. The Russian forces remained in the city until 1917.