NATO is currently conducting its largest-ever Black Sea naval exercises to strengthen maritime collective defense and resist Russian efforts to limit international access to the Black Sea. Sea Breeze 2021 is the largest iteration yet of NATO’s annual Sea Breeze exercises, held in the Black Sea since 1997 to strengthen interoperability between NATO and partner navies. The United States and Ukraine are cohosting the ongoing Sea Breeze 2021 exercise, which runs from June 28 to July 10, in the Black Sea. NATO explicitly intends Sea Breeze 2021 to “demonstrate presence and assure allies of [NATO’s] maritime commitment to collective defense.” The exercises involve 32 states, 5,000 personnel, 32 ships, and 40 aircraft. Participating warships and personnel will practice multiple types of operations, including amphibious warfare, maritime interdiction, air defense, and anti-submarine warfare.

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