Ukraine sent a truce proposal to Russia on August 13, calling for both sides to stop attacking civilian targets in the Black Sea. The offer, relayed through a third party, arrived after weeks of escalating strikes turned the region’s most important grain export corridor into something closer to a war zone than a shipping lane.

The Black Sea corridor is one of the world’s critical arteries for wheat and other grain shipments, and the fighting has already slashed Ukrainian grain exports by 76% year-on-year in early August.

How the corridor collapsed

On August 12, Ukrainian missile and drone strikes forced Russia to suspend operations at all three terminals in Novorossiysk. That port city on Russia’s Black Sea coast is the country’s most important grain export hub.

Turkey stepped into the diplomatic gap around August 9-10, communicating directly with both Kyiv and Moscow and urging a ceasefire to protect trade routes.