The crisis unfolded through mutual, intensifying attacks beginning in early July 2026:
Ukrainian offensive (July 7–15): Ukraine's Unmanned Systems Forces launched a sustained drone campaign against Russia's shadow fleet in the Sea of Azov and Black Sea, striking a cumulative 116 Russian vessels over roughly nine days — including oil tankers, gas tankers, and tugboats . The attacks forced Russia to suspend traffic through the Kerch Strait, its key waterway connecting the Sea of Azov to the Black Sea, starting July 10 .
Russian retaliation (July 16–19): Russia struck civilian cargo ships under Tanzania, Liberia, and Marshall Islands flags . The deadliest single attack came on July 19, when Russian cruise missiles hit a Guinea-Bissau-flagged grain vessel near Odesa, killing at least 10 crew members and causing a fire . Russia also hit port infrastructure in Odesa and Pivdennyi .
Result: Both sides' attacks brought civilian vessel traffic through the maritime corridor to a complete halt. Shipowners avoided Odesa ports, and Russia's own grain shipping through the Don-Azov Channel was also suspended .
The escalation pushed wheat prices to their highest levels in over a year — and by some measures to a two-year high:
The market reaction reflected the fact that both Russia and Ukraine are among the world's largest grain exporters, and the conflict struck at the peak of the July harvest season .
Andrii Sybiha explicitly compared Russia's campaign against civilian shipping in the Black Sea to Iran's attacks on vessels in the Strait of Hormuz . The comparison served several rhetorical and strategic purposes: