May 1993 — A medium-range Rodong ballistic missile is test-fired into the Sea of Japan.
August 1998 — Part of an intermediate-range Taepodong-1 ballistic missile flies over Japan and falls into the Pacific Ocean.
January 2003 — North Korea withdraws from the Nuclear Nonproliferation Treaty.
August 2003 — The first round of six-party denuclearization talks takes place in Beijing.
February 2005 — North Korea declares it has nuclear weapons.
July 2006 — North Korea launches seven ballistic missiles, including a Taepodong-2 missile that falls into the Sea of Japan.
July 2006 — The U.N. Security Council adopts a resolution demanding that North Korea suspend all activities related to its ballistic missile program.
October 2006 — North Korea announces it has conducted an underground nuclear test.
October 2006 — The U.N. Security Council adopts a resolution banning North Korea’s ballistic missile and nuclear arms activities.
April 2009 — North Korea launches a rocket viewed as a possible intercontinental ballistic missile, claiming it is a satellite launch. The rocket flew over northeast Japan and fell into the Pacific with no reports of damage in Japan.
May 2009 — North Korea carries out its second nuclear test.
June 2009 — The UNSC adopts resolution 1874 condemning the nuclear test and imposing financial, trade and other sanctions.
March 2010 — A South Korean warship sinks in the Yellow Sea, allegedly due to a North Korean torpedo attack, killing 46 people. North Korea denies involvement.
September 2010 — North Korean leader Kim Jong Il’s third son, Kim Jong Un, becomes vice chairman of the Central Military Commission, joining the ruling party leadership and set on course to succeed his father.
November 2010 — North Korea shells a South Korean border island in the Yellow Sea, killing four people.
December 2011 — North Korea announces Kim Jong Il has died. Kim Jong Un is named supreme commander of the Korean People’s Army.
Feb. 29, 2012 — North Korea announces it has agreed to a moratorium on nuclear tests, long-range missile launches and uranium enrichment activities in exchange for food aid from the U.S.
March 16 — North Korea announces it will launch a rocket with a satellite between April 12 and 16.
April 8 — The rocket is readied on a launchpad and shown to foreign media.
April 11 — Kim Jong Un is named “first secretary” of ruling Workers’ Party of Korea at a party conference.
April 13 — North Korea launches the rocket but says it “failed to enter its preset orbit.”
Dec. 1 — North Korea says it will launch a rocket with a satellite between Dec. 10 and 22.
Dec. 10 — North Korea announces extension of the launch period until Dec. 29.
Dec. 12 — North Korea launches the rocket, says it was successful.