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Ticonderoga-class guided-missile cruiser USS Chancellorsville (CG 62) along with Japan Maritime Self Defense Force (JMSDF) guided-missile destroyer JS Chokai (DDG 176) and Republic of Korea Navy guided-missile destroyer ROKS Sejong The Great (DDG 991) conduct a tri-lateral Ballistic Missile Defense (BMD) exercise in the Sea of Japan, Oct. 6. Chancellorsville provided air defense to the units as they conducted the ballistic missile exercise, which includes, detecting, tracking, and intercepting simulated targets, as well as coordination, communication, and information-sharing between the three countries. Chancellorsville is operating as part of the Ronald Reagan Carrier Strike Group, which is forward-deployed to the U.S. 7th Fleet area of operations in support of a free and open Indo-Pacific region. U.S. 7th Fleet is the largest forward-deployed numbered fleet in the world and, with the help of 35 other maritime-nation allies and partners, the U.S. Navy has operated in the Indo-Pacific region for more than 70 years, providing credible, ready forces to help preserve peace and prevent conflict.