Russia lost control of its southern naval power without firing a single shot.
A 700-meter strait in Istanbul choked 300 years of naval expansion under a 1936 treaty.
Military analysts in 2026 still debate why can't Russia control the Black Sea despite its massive naval budget. The Montreux Convention of 1936 gave Turkey legal control over the Bosphorus Strait in Istanbul, effectively sealing off Russian warships from entering the Mediterranean during times of conflict.
How a 700-meter waterway in Istanbul neutralized Russia's 300-year naval strategy through a 1936 treaty, turning the Black Sea Fleet into a trapped coastal target.
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