Mevlüt Çavuşoğlu, the foreign minister of Turkey, triggers the wartime clause of the Montreux Convention and limits movements of military vessels whose bases are not on the Black Sea coast. (Reuters) Montreux Convention Regarding the Regime of the StraitsReactions to the 2021–2022 Russo-Ukrainian crisis, International reactions to the 2022 Russian invasion of Ukraine link embed save