South Korea develops a long-range cruise missile capable of striking North Korea, Japan, Russia and China.
South Korean President Moon Jae-in announces plans to create a Northeast Asian railroad community with North Korea, the United States, China, Japan, Russia, and Mongolia.
North Korea launches a Short-Range Ballistic missile near Wŏnsan towards the Sea of Japan, according to South Korea. The missile reportedly lands in Japan's exclusive economic zone (EEZ) after traveling 450 km.
U.S. and South Korean officials confirm that North Korea launched a test missile from the west coast city of Kusong. The projectile travelled to the east for 30 minutes and 435 mi reaching an altitude of more than 1245 mi before landing in the Sea of Japan, 60 mi south of the Russian city of Vladivostok.
North Korea attempts again to launch a BM25 Musudan intermediate-range ballistic missile capable of striking South Korea or Japan but is unsuccessful.
Amid growing concern about North Korea's ballistic missile capability, South Korea, Japan and the U.S. are to hold their first ever joint anti-missile exercise next month, according to South Korea's Ministry of National Defense. The three countries will practice "detecting and tracing a hypothetical North Korean missile," said a ministry official.
North Korea fires two mid-range ballistic missiles as the leaders of the United States, Japan and South Korea meet to discuss the security threat it poses to the region.
South Korean sources say a North Korean medium range missile has been moved to the eastern coast and that it may be ready for testing or for attacking Japan or Guam.
2013 Korean crisis: North Korea declares it is in a state of war with South Korea, and will conduct any further dealings under "wartime regulations". Russia urges calm on both sides. North Korea threatens to shut down the industrial plant in Kaesong, on the border with South Korea.
North Korea threatens to attack American military bases in Japan in response to the use of nuclear-capable B-52 bombers in joint military drills with South Korea.
Officials from the United States, South Korea and Japan are to meet in Washington, D.C., to discuss North Korea.