It is the Turkish Strait

The Turkish Strait (also known as the Black Sea Strait) is the only channel connecting the Black Sea and the Mediterranean Sea, including the Bosporus Strait (also known as the Strait of Istanbul), Malma Lahai and the Dardanelles Strait (also called the Canakkale Strait) have been battlegrounds for military strategists throughout the ages, and their strategic position is very important.

The Turkish Strait, known as the "throat of the world", is the only strait from the Mediterranean to the Black Sea, so it is also called the Black Sea Strait. It consists of three parts: the Bosporus Strait, the Sea of ??Marmara and the Dardanelles Strait, with a total length of 345 km. The entire strait runs northeast-southwest and is the dividing line between Asia and Europe.