South Korea states that it will hold more military exercises with the United States following the conclusion of a naval exercise in the Yellow Sea, despite threats from North Korea.
- South Korea and the United States cancel a joint naval drill against North Korea in the Yellow Sea, citing its previous anti-submarine training -- held from Sept. 27 to Oct. 1 -- and a desire "not to irritate neighboring countries" ahead of the upcoming 2010 G-20 Seoul summit.
- The People's Liberation Army Navy commences artillery exercises in the Yellow Sea in response to those being conducted by South Korea and the United States against North Korea.
- North Korea fires a medium-range ballistic missile about 60 kilometers (37 miles) into its eastern waters, in the direction of Japan according to United States and South Korean officials.
- The United States deploys parts of its Terminal High Altitude Area Defense in South Korea amidst high tension caused by North Korea's escalation of its missile and nuclear weapons programs.
- According to South Korean and United States officials, a missile test in North Korea ends in failure, with the missile exploding seconds after launch.