Contemporary era
Thanks to the geographical closeness to the West and to communications with nearby countries' enlightenment movements, Tabriz became the centre of the Iranian Constitutional Revolution movements between 1905 and 1911, which led to the establishment of a parliament in Iran and the formation of a constitution. Sattar Khan and Bagher Khan, two Tabrizi reformists who led Tabriz people's solidarity against the absolute monarchy, had a great role in achievement to the goals of Iran's constitutional revolution. In 1909, Tabriz was occupied by the Russian forces. Four months after the constitutional revolution's success, in December 1911, the Russians reinvaded Tabriz. After crushing the local resistance by invading Russian troops, they started suppressing the constitutional revolutionaries and residents of the city. Following the invasion, Russian troops executed about 1,200 of Tabriz residents. As a result of the campaign, Tabriz was occupied by the Russian forces between 1911 and 1917.
From the very start of World War I, Iran declared neutrality. When the war erupted on a full scale, Tabriz and much of northwestern-northern Iran had already been de facto occupied by Russia for several years. In later years of World War I, the Ottoman troops intervened and took control of the city by defeating the Russian troops stationed there. By this time, the Ottoman army led by Enver Pasha threatened the whole Russian army in the Caucasus region. Russian troops recaptured the city from the Ottomans at a later stage of the war. By escalation of the revolution in Russia, the Russian armies in Iranian Azerbaijan were evacuated, and the actual power passed into the hands of the local committee of the democrat party, with Ismail Nawbari at its head. Following Russia's retreat, the Ottomans captured the city once again for a few months until the decisive end of the war, and retreated thereafter. After World War I, a new era in the county's history began. Reza Pahlavi, brigadier-general of the Persian Cossack Brigade, declared himself the king of the country following a coup d'état. He started with promises of modernization programs in Iran which was concentrated on the unification of the country, under the idea of one country, one nation. This included centralization of the power and imposing restrictions on the local culture, heritage, and language in Iranian Azerbaijan, and the city of Tabriz. The modernization and nationalization plan of Reza Shah continued until the surge of World War II.
At the final year of the World War II despite the declaration of the neutrality by the Iranian government, the country was occupied by the allied forces. The allied forces then urged Reza Pahlavi to abdicate and installed his son Mohammad Reza as the new king of the country. The postwar situation was further complicated by Soviet aid to set up a local government called Azerbaijan People's Government in Northwest Iran, having Tabriz as its capital. The new Soviet-backed local government was run by Ja'far Pishevari and held power for one year starting from 1946. Pishevari's government gave more freedom to speech and education in Azerbaijani language and promoted local cultural heritage and gained some popularity among the residents. However, after the withdrawal of Soviet forces, Pishevari's limited armed forces were crushed by the Imperial Iranian army and the Iranian government retook control of the city. One of the major establishments in the period of Pishevari's government was opening of the University of Tabriz which played a major role in the later political movements and protests in the region.
For the next 30 years, after the collapse of Azerbaijan's autonomous government, Tabriz enjoyed a stable era until the revolution in 1979. During this period the city received significant investment in its industries and transformed into a heavy-industry hub in the northwestern Iran. The need for a strong workforce increased immigration from all around Azerbaijan toward Tabriz. During this era and because of the continuous policy of the government centralization in Tehran as well as changes in communication and transportation, the city lost its historical dominance, but turned into the gate for reform and modernization of the country.
Starting with 1978 and with the heat of the Iranian Revolution, revolutionary movements of some of Tabriz residents played a major role in the revolution. After the revolution, the residents of the city were unsatisfied with the outcome, mainly because of the ignorance of the revolutionary government about the rights of the Azerbaijani minority. Another major source of dissatisfaction was the support of most of Iranian Azerbaijanis including Tabriz residents from a more liberal cleric, Grand Ayatollah Shariatmadari, who was against the content of the new constitution which was mixing religion and state together. The unrest in the city calmed down after brutal crush of the protesters in Tabriz and after house arrest of Shariatmadari.
In the 1980s, due to the Iran–Iraq War, like the rest of the country, most of the construction and development projects in the city were stopped in order to fund the war costs. In addition to the indirect effects of the war, city's industrial zone, especially the oil refinery was also a major target for airstrikes by Iraqi's air forces because of the closeness to the Iraqi borderlines, and their strategic roles in the country's economy. With the escalation of the war, the attacks turned to War of the Cities and the air attacks later turned into the random strikes on the residential areas of the city in the later phase of the war.
In recent years, Tabriz is much more stable and the new developments in the city are rapidly changing the face of the city.