Turkey controlled the Dardanelles
The answer is Turkey. The 1936 Montreux Convention establishes it as an International Shipping Lane with Turkey retaining the right to restrict Naval Traffic to Non-Black Sea nations.
If it is to the Mediterranean Sea it would be The Bosporus and The Dardanelles Strait's.
The Dardanelles Straight connects the Sea of Marmara to the Eagean Sea and the Bosphorous Straight connects it to the Black Sea
See the link below. The Dardanelles was not part of World War 2 but rather World War 1. Editor's note. It was the Brits (namely Winston Churchill, in World War 1, of the admiralty) who wanted to secure the Dardanelles strait to control shipping access. At the time Britain controlled Turkey. There was warring going on there during World War 1. See the link below for the story of the Battle of Dardanelles.
Dardanelles
The Dardanelles were known as the Hellespont.
Dardanelles - band - was created in 2006.
Dardanelles Operation happened in 1807.
Dardanelles Army was created in 1916.
Fight for the Dardanelles was created in 1915.
The Aegean Sea
The duration of The Hero of the Dardanelles is 3540.0 seconds.