- North Korea on Tuesday threatens to attack U.S. and South Korean bases
- Pyongyang puts its troops on full alert and announces its military is ready for combat
- The threat comes amid joint U.S.-South Korean military exercises
North Korea upped the ante Tuesday in its war of words, threatening to target South Korea and U.S. military bases.
Even by North Korean standards, the series of threats this month by leader Kim Jong Un and ensuing actions have been incredibly provocative, making the situation on the Korean Peninsula more worrisome.
Here's a look at Kim's escalating rhetoric and his country's actions since he came to power after his father's death in 2011:
As South Korea hosts world leaders at an international nuclear security summit in Seoul, North Korea moves a long-range rocket toward a launch pad.
Pyongyang says it plans to carry out the test in mid-April as part of a commemoration of the 100th anniversary of the birth of Kim Il Sung, the nation's founder.
Defying warnings by U.S. President Barack Obama that Kim has nothing to gain from provocations, Pyongyang launches the rocket. It breaks apart and falls into the sea.
Kim visits the same military unit behind a 2010 attack on South Korea's Yeonpyeong Island, where he reminds the troops to be ready to fight a "sacred war" against Seoul.
The North Korean leader makes the veiled threat just ahead of an annual war games conducted on the Korean Peninsula by the United States and South Korea.
The dictator calls the joint Seoul-Washington military exercises a "war rehearsal" to invade.
North Korea claims to have developed missiles that can reach the U.S. mainland.
Kim announces plans to launch another long-range rocket in a renewed effort to send a satellite into space.
Two days after the government announces the launch window is being pushed back because of technical issues, the rocket lifts off from the west coast of North Korea. Pyongyang declares the mission a success.
North Korea announces it is planning a new nuclear test and more long-range rocket launches, all of which it says are part of a new phase of confrontation with the United States.
The threats come two days after the U.N. Security Council approves the broadening of sanctions in response to the rocket launch in December that apparently put a satellite in orbit.
North Korea carries out an underground nuclear bomb test on February 12.
The test is designed "to defend the country's security and sovereignty in the face of the ferocious hostile act of the U.S.," the North's state-run Korean Central News Agency says at the time, referring to new U.S.-led sanctions.
"This nuclear test is our first measure, which displayed our maximum restraint. ... If the U.S. continues with their hostility and complicates the situation, it would be inevitable to continuously conduct a stronger second or third measure."
Angered by U.N. Security Council sanctions over its nuclear test, North Korea threatens for the first time to launch a pre-emptive nuclear strike against the United States and South Korea.
It's one of a series of provocative threats and, in some cases, actions by North Korea that begins with Pyongyang saying it is scrapping the 1953 truce that effectively ended the Korean War. At the same time, it cuts off its direct phone links with South Korea at Panmunjom, the abandoned village that sits on the border between the two countries.
North Korea then doubles down on the threat, saying it is nullifying the joint declaration on the denuclearization of the Korean Peninsula. One of the country's top generals, according to published reports, claims Pyongyang has nuclear-tipped intercontinental ballistic missiles that are ready to be fired.
Although U.S. officials don't believe North Korea is in a position to strike the United States, the Obama administration responds to the threat by announcing plans to deploy additional ground-based missile interceptors on the West Coast.
U.S. officials also say B-52 bombers are making flights over South Korea as part of annual, joint military exercises this month that have enraged North Korea.
Pyongyang releases a new propaganda video that shows an imaged missile attack on U.S. government buildings in Washington, including the White House and the Capitol. The roughly four-minute video is posted on the YouTube channel of the North Korean government website Uriminzokkiri.
North Korea threatens Tuesday to attack U.S. and South Korea bases, putting its troops on alert. It announces through state-run media that the military is ready for combat. The threat follows claims that U.S. B-52 bombers again made flights Monday over South Korea.