2004 February 24-28 - The U.S., North Korea, South Korea, China, Japan and Russia meet in Beijing, China for more talks. The summit closes with no major progress but with an agreement for more talks.
June - The six nations meet again in Beijing for more talks.
August 2004 - North Korea offers to freeze its nuclear program in exchange for aid, easing of sanctions and being removed from the US's list of state sponsors of terrorism. The U.S. wants North Korea to disclose all nuclear activities and allow inspections.
2005 February 10 - North Korea drops out of six-party nuclear talks and says it will bolster its nuclear weapons arsenal. North Korea insists on a bilateral non-aggression pact with the U.S. before it will consider dismantling its nuclear program. The U.S. insists Pyongyang must first agree to permanently and verifiably dismantle its nuclear weapons program before it will grant any incentives, including economic assistance and diplomatic recognition.
August 7 - After meeting for 13 straight days, diplomats from the United States, North Korea and four other Asia-region powers decide to take a recess from talks aimed at getting North Korea to dismantle its nuclear program.
September 13 - The six-party talks resume in Beijing.
September 19 - North Korea agrees to give up its entire nuclear program, including weapons, a joint statement from six-party nuclear arms talks in Beijing said. "The Democratic People's Republic of Korea (North Korea) committed to abandoning all nuclear weapons and existing nuclear programs and returning at an early date to the treaty on the nonproliferation of nuclear weapons (NPT) and to IAEA (International Atomic Energy Agency) safeguards," the statement said. - In exchange, the U.S., China, Japan, Russian and South Korea have "stated their willingness" to provide energy assistance to North Korea, as well as promote economic cooperation. - North Korean officials later state that their country would begin dismantling its nuclear program only if the U.S. provides a light-water reactor for civilian power -- a demand that could threaten a day-old agreement among North Korea, its neighbors and the United States.
"Without this physical guarantee of the (light-water reactor), our position is not to even dream of us giving up our nuclear deterrence."
2006 July 4 - North Korea test-launches a Taepodong-2 missile along with two short-range rockets, but the long-range missile apparently fails.
July 15 - The UN Security Council unanimously passes a resolution demanding that North Korea suspend its missile program. The North Korean ambassador immediately rejects the resolution.
October 9 - North Korea claims to have successfully tested a nuclear weapon. The supposed test is conducted at an underground facility in Hwaderi near Kilju city. Though the nature of the blast as nuclear remains unconfirmed, South Korea's geology research center detects an artificial earthquake in the region of the test, and world leaders condemn North Korea's actions (test conducted at 10:36 am local time or 9:36 pm Eastern time on 10/8/2006).
October 14 - The UN Security Council approved a resolution imposing sanctions against North Korea, restricting military and luxury good trade and requiring an end to nuclear and ballistic missile tests.
October 16 - An analysis of air samples collected on October 11, 2006 detects radioactive debris, confirming North Korea's nuclear test.
2007 February 13 - North Korea agrees to close its main nuclear reactor in exchange for an aid package worth $400 million.
March 5-6 - U.S. Assistant Secretary of State Christopher Hill meets with his North Korean counterpart, Vice Foreign Minister Kim Kye Gwan, to discuss North Korea's nuclear program.
March - During six-party talks, the U.S. agrees to release approximately $25 million of North Korean funds frozen at a Macao bank, a sticking point in the negotiations. The actual release of funds does not occur until June.
June 25 - After spending two days in Pyongyang meeting with North Korea's nuclear negotiator, the U.S. Envoy to North Korea, Chris Hill, says that North Korea has reaffirmed its commitment to the nuclear disarmament agreement reached in February. He also says North Korea has invited the IAEA to monitor the shutdown of the Yongbyon nuclear facility, scheduled to occur within a few weeks.
September 2 - U.S. Assistant Secretary of State Christopher Hill announces that after talks in Geneva between U.S. and North Korean officials, North Korea has agreed to fully declare and disable its nuclear programs by the end of 2007.
September 30 - At six-party talks in Beijing, North Korea signs an agreement stating it will begin disabling its nuclear weapons facilities. North Korea also agrees to include a U.S. team of technical experts in the disabling activities.
October 2, 2007 - South Korean President Roh Moo-hyun becomes the first South Korean leader to walk across the Demilitarized Zone separating North and South Korea on his way to a three day summit with North Korean leader Kim Jong Il.
October 4, 2007 - North Korean leader Kim Jong Il and South Korean President Roh Moo-hyun sign an eight-point agreement in Pyongyang; among other things, it calls for a smooth implementation of the six-party agreements to shut down of North Korea's nuclear facilities and the replacement of North and South Korea's current armistice agreement with a permanent peace.
November 14-16, 2007 - North Korean Prime Minister Kim Yong Il and South Korean Prime Minister Han Duck-soo meet in Seoul, South Korea. At the end of the summit, they announce a number of economic projects including cross-border cargo train services, road repairs, and construction of a new industrial complex near Haeju, North Korea.
December 31 - North Korea misses a deadline to declare all its nuclear programs.
2008 January 4 - The North Korean Foreign Ministry states, via broadcast message, that North Korea had already provided enough explanation to meet the 12/31/2007 deadline, and that it had provided that information in a report presented to the U.S. in November. Members of the six party talks dispute this claim.
February 21 - After meeting with North Korean Foreign Minister Kim Kye Gwan, South Korean envoy Chun Yung Woo states that North Korea still plans to meet the obligations it agreed to during six party talks in 2007.