I'm replying with a bit of a history that I already had replied with.
Why? Because this war started centuries ago. 😔
Also posted a song associated with this darn war, yet I'll skip it.
.https://www.britannica.com/topic/Russo-Turkish-wars
...When Turkey deposed the Russophile governors of Moldavia and Walachia in 1806, war broke out again, though in a desultory fashion, since Russia was reluctant to concentrate large forces against Turkey while its relations with Napoleonic France were so uncertain. But in 1811, with the prospect of a Franco-Russian war in sight, Russia sought a quick decision on its southern frontier. The Russian field marshal M.I. Kutuzov’s victorious campaign of 1811–12 forced the Turks to cede Bessarabia to Russia by the Treaty of Bucharest (May 28, 1812).
Russia had by now secured the entire northern coast of the Black Sea. Its subsequent wars with Turkey were fought to gain influence in the Ottoman Balkans, win control of the Dardanelles and Bosporus straits, and expand into the Caucasus. The Greeks’ struggle for independence sparked the Russo-Turkish War of 1828–29, in which Russian forces advanced into Bulgaria, the Caucasus, and northeastern Anatolia itself before the Turks sued for peace. The resulting Treaty of Edirne (September 14, 1829) gave Russia most of the eastern shore of the Black Sea, and Turkey recognized Russian sovereignty over Georgia and parts of present-day Armenia.
The war of 1853–56, known as the Crimean War, began after the Russian emperor Nicholas I tried to obtain further concessions from Turkey. Great Britain and France entered the conflict on Turkey’s side in 1854, however, and the Treaty of Paris (March 30, 1856) that ended the war was a serious diplomatic setback for Russia, though involving few territorial concessions... continued below...
https://www.britannica.com/event/Treaty-of-Paris-1856
Treaty of Paris, (1856), treaty signed on March 30, 1856, in Paris that ended the Crimean War. The treaty was signed between Russia on one side and France, Great Britain, Sardinia-Piedmont, and Turkey on the other. Because the western European powers had fought the war to protect Ottoman Turkey from Russia, the treaty gave special attention to this problem. The signatories guaranteed the independence and territorial integrity of Turkey. Russia was obliged to surrender Bessarabia (situated at the mouth of the Danube River) to Moldavia, which along with Walachia were reorganized as autonomous states under Ottoman suzerainty. (These two principalities later joined to form Romania.) The Black Sea was neutralized (i.e., its waters were closed to all warships), and the Danube was opened to the shipping of all nations. In 1870 Russia repudiated the demilitarization of the Black Sea and began to rebuild its naval fleet there.
The last Russo-Turkish War (1877–78) was also the most important one. In 1877 Russia and its ally Serbia came to the aid of Bosnia and Herzegovina and Bulgaria in their rebellions against Turkish rule. The Russians attacked through Bulgaria, and after successfully concluding the Siege of Pleven they advanced into Thrace, taking Adrianople (now Edirne, Tur.) in January 1878. In March of that year Russia concluded the Treaty of San Stefano with Turkey. This treaty freed Romania, Serbia, and Montenegro from Turkish rule, gave autonomy to Bosnia and Herzegovina, and created a huge autonomous Bulgaria under Russian protection. Britain and Austria-Hungary, alarmed by the Russian gains contained in the treaty, compelled Russia to accept the Treaty of Berlin (July 1878), whereby Russia’s military-political gains from the war were severely restricted.
