Nicholas I of Russia conflict Russo-Persian War of 1826–28
In 1826–28, Nicholas fought the Russo-Persian War (1826–28), which ended with Persia forced to cede its last remaining territories in the Caucasus. Russia had conquered all the territories of Iran in both the North Caucasus and South Caucasus, comprising modern-day Georgia, Dagestan, Armenia, and Azerbaijan, through the course of the 19th century. The treaty further conceded extraterritoriality to Russian subjects in Iran (capitulation). As Professor Virginia Aksan adds, the 1828 Treaty of Turkmenchay "removed Iran from the military equation."Russia fought a successful war against the Ottomans in 1828–29, but it did little to increase Russian power in Europe. Only a small Greek state became independent in the Balkans, with limited Russian influence. In 1833, Russia negotiated the Treaty of Unkiar-Skelessi with the Ottoman Empire. The major European parties mistakenly believed that the treaty contained a secret clause granting Russia the right to transit warships through the Bosphorus and Dardanelles straits. This misconception led to the London Straits Convention of 1841, which affirmed Ottoman control over the straits and forbade any power, including Russia, from sending warships through them. Buoyed by his role in suppressing the revolutions of 1848 as well as his mistaken belief he could rely on British diplomatic support, Nicholas moved against the Ottomans, who declared war on Russia on 8 October 1853. On 30 November, Russian Admiral Nakhimov caught the Turkish fleet in the harbor at Sinope and destroyed it.
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