What are the reasons and what is the result of the Crimean war?

The main reason for Russia’s participation in the Crimean War is the protection of its southern borders. The Russian state in every possible way sought to strengthen its position within the Black Sea and spread its influence further, to the Balkans.
Russia lost the Crimean War, which ultimately led to the fact that it lost its influence not only in the Black Sea, but also its influence in the international arena. As a result of this war, Russia was prohibited from having its own navy within the Black Sea.