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By Alix Culbertson, news reporter

As Donald Trump and Kim Jong Un prepare for a historic meeting on 12 June, Sky News looks at the turbulent history between North and South Korea - two sparring nations living on one 680 mile-long peninsula.

Toward the end of World War II, Soviet Union declares war on Japan, which then occupied Korea, and marches onto the peninsula.

The US requests that Soviet forces halt their advance to leave the south, including Seoul, to be occupied by the US.

The Red Army establishes a military government over the North and the US lands two weeks later in the South, establishing a military government there.

With the Cold War taking hold, both sides start promoting Korean leaders aligned with their politics.

In the North Kim Il Sung, Kim Jong Un's grandfather, who served in the Soviet Army, becomes a major political figure

In the South anti-Communist Syngman Rhee is the most prominent politician.

The US takes the issue to the UN, but the Soviets refuse to allow the UN Temporary Commission on Korea (UNTCOK) to operate in the North.

Elections are held in the South and the Republic of Korea is established, replacing the US military occupation. US forces leave the following year.

In North Korea the Democratic People's Republic of Korea is declared, with Kim Il Sung as prime minister. Soviet forces leave.

Both sides consider themselves to be the government of the whole peninsula, with the division simply temporary.

North Korea invades the South and overruns most of the country for nearly three months.

The UN, led by the US, steps in to defend the South. Chinese forces at China's border intervene to defend the North.

A truce halts the fighting, with an armistice restoring the north-south boundaries. South Korean leader Syngman Rhee refuses to sign the armistice, but reluctantly agrees to abide by it.

The war is never formally ended with a peace treaty.

The armistice established the Korean Demilitarised Zone (DMZ).

Over the following decades North Korea announces it will no longer abide by the armistice six times - in 1994, 1996, 2003, 2006, 2009 and 2013.

Many families are divided by the border, which does not exactly follow the previous one, and many are displaced due to the war.

Tensions between the two sides escalate. Low-level clashes - the Korean DMZ Conflict - take place between 1966 and 1969.

The South launches undercover raids on the North.

North Korea attacks South Korea's presidential residence, the Blue House.

A South Korean airliner is hijacked by a North Korean agent, with 39 passengers returned two months later. The four crew and seven passengers remain in North Korea

Ahead of US President Richard Nixon's China visit the following year, South Korea's President initiates covert contact with Kim Il Sung.

The first Red Cross talks between the two sides are held, with most participants being intelligence or party officials.

The director of the Korean CIA secretly meets Kim Il Sung in Pyongyang. Kim apologises for the Blue House raid, saying he had never sanctioned it.

North Korea's deputy premier makes a secret visit to Seoul.

The North-South Joint Statement is issued, saying reunification must be solved without foreign powers, be peaceful and must transcend the different ideologies.

North Korea suspends talks after the South Korean opposition leader is kidnapped by the South Korean CIA. But the talks restart later than year.

North Korea proposes three-way talks with the US and South Korea.

At the same time North Korea attempts to assassinate the South Korean president in then-Rangoon, Burma.

He survives but 21 others died and dozens are injured. Two of three bombers are captured, with one confessing to being a North Korean military officer.

North Korea's Red Cross sends emergency supplies to the South after heavy floods.

Talks resume with the first reunion of separated families the following year, as well as cultural exchanges.

The US and South Korea stage a military exercise, damaging any goodwill from the North.

Seoul hosts the Olympics. North Korea tries, and fails, to arrange a boycott by its communist allies.

High-level talks held in Seoul as part of the new South Korean president Roh Tae-woo's diplomatic initiative, Nordpolitik, which proposed a Korean Community, similar to a confederation.

The North is angered by the Soviet Union normalising relations with the South, but talks are ongoing with Seoul.

The talks lead to an agreement on exchanges, non-aggression and reconciliation, as well as joint denuclearisation.

North and South Korea join the UN.

A unified Korean team compete at the World Table Tennis Competition in Japan and another unified team compete at the World Youth football Competition in Portugal.

The Cold War ends, bringing economic crisis to the North - and expectations that a reunification would happen soon.

North Koreans flee in increasing numbers to the South.

The US and the North sign an agreed framework to freeze Pyongyang's nuclear power plant programme and normalise relations between the two countries.

Kim Il Sung dies of heart attack at 82.

Hundreds of thousands of people were flown into Pyongyang from all over North Korea for his funeral.

His eldest son Kim Jong Il then became supreme leader.

Official statistics find 561 defectors living in South Korea.

South Korea announces the Sunshine Policy - an attempt to replace decades of confrontation with dialogue and investment in the North. Critics say the policy funded the regime and achieved very little.

The North abducts four high-ranking South Korean military officers - a kidnapping that comes to light only in 2011.

The first inter-Korean summit takes place between Kim Dae Jung and Kim Jong Il.

Family reunions follow as a result of the talks, and the two Koreas march together at the Sydney Olympics.

The South's Kim Dae Jung is awarded the Nobel Peace Prize.

Trade increased, with the South becoming the North's largest trading partner.

US President George W Bush, who does not support the Sunshine Policy, calls North Korea a member of an Axis of Evil, along with Iran and Iraq.

A fresh round of talks is prompted by concerns over the North's potential to develop nuclear missiles. They include the two Koreas, the US, Russia, China and Japan.

South Korean President Roh Moo Hyun walks across the DMZ and travels to Pyongyang for talks with Kim Jong Il. They reaffirm the 2000 joint declaration and discuss the advancement of relations.

They sign a peace declaration calling for international talks to replace the armistice which ended the Korean War, with a permanent peace treaty.

About 750,000 people remain separated from immediate family members.

A South Korean Navy ship with 104 crew sinks in the Yellow Sea after an explosion. Nearly half the crew dies and an international research team claims North Korea had fired a torpedo, which the North denies.

Seoul cuts all trade with the North and Pyeongyang retaliates by severing all ties.

North Korea fires at the South's Yeonpyeong island, and the South returns fire.

Kim Jong Il dies. His eldest son Kim Jong Nam had fallen out of favour in 2001 for attempting to enter Japan on a fake passport to visit Tokyo Disneyland. So his second child, Kim Jong un, becomes Supreme Leader.

North Korea launches a scientific and technological satellite into orbit after two previous failed launches - the US sends warships to the region.

UN Security Council condemns the North for launching the satellite, with Kim Jong Un escalating rhetoric dramatically, suggesting imminent nuclear attacks against South Korea, Japan and the US.

The North claims to have successfully tested a nuclear device small enough to be weaponised. The South says an artificial earthquake suggests a nuclear test has occurred.

EU tightens sanctions in response and the North tells China it will stage two more tests in 2013 to force the US into diplomatic talks.

During a UN disarmament conference the North threatens the "final destruction" of the South.

Kim Jong Un's uncle is executed, apparently for "treason" - a sign of the brutality of Kim's regime.

Three crashed North Korean drones are found over the year, with one having pictures of the blue House and military installations near the DMZ.

The North carries out five missile tests over the summer, including an adapted Scud missile.

Kim Jong Un says he is willing to resume higher-level talks with the South.

Later in the year two South Korean soldiers are wounded by a bomb in the DMZ, with the South accusing the North of planting it - which it denies.

South Korea restarts propaganda broadcasts to the North via speakers on the border.

The countries arrange talks to relieve tensions.

During the talks North Korea deploys more than 70% of its submarines, raising tensions further.

On the fourth day of talks they reach an agreement and military tensions are eased.

Peace talks are held again about the North's missile tests - but Pyongyang keeps carrying them out.

A spate of digital breaches on Asian banks are linked to North Korea, security researchers claim.

The North carries out its fifth nuclear test - second of the year - as part of its 68th anniversary. South Korea reveals it has a plan to assassinate Kim Jong Un.

Pyongyang threatens a nuclear strike on the US.

American student Otto Warmbier is arrested for allegedly attempting to steal a propaganda poster, and sentenced to 15 years imprisonment with hard labour.

Moon Jae In is elected President of South Korea and promises to return to the Sunshine Policy.

The US and South Korea reaffirm their intent to push ahead with deployment of the THAAD missile defence system which shoots down ballistic missiles in their terminal phase.

Kim Jong Un sends a delegation to the Winter Olympics in South Korea and the Seoul-Pyongyang hotline is reopened after nearly two years.

North and South Korea march together at the opening ceremony and field a united women's ice hockey team. The North sends Kim Yo Jong, Kim Jong Un's sister.

The North Korean delegation passes on an invite to President Moon to visit the North.

Kim Jong Un's exiled elder brother Kim Jong Nam is killed at Kuala Lumpur airport. The US State Department determines he was killed using VX nerve agent which they said was administered by two women on behalf of North Korea.

Mr Warmbier is returned to his parents in the US in a coma having been imprisoned by the North for 17 months. He dies six days later, with the US blaming North Korea for his death.

Donald Trump is elected President of the US and calls Kim Jong Un "a pretty smart cookie", but later calls him "a madman".

The US leader than embarks on a tit-for-tat insult exchange with the North's leader, whose office calls him a "dotard" and a "mentally deranged" man who "spouts rubbish" - among other insults.

Kim Jong Un then invites Mr Trump to have a meeting.

The North carries launches 23 missiles in 2017, including its first intercontinental ballistic missile - Hwasong-14 - into japan's exclusive economic zone.

Experts reveal if it had been aimed long-distance, instead of high, it would have reached Alaska, Hawaii and maybe Seattle.

Kim Jong Un claims "nuclear weaponisation" has been achieved and changes his tune dramatically.

He makes his first overseas trip since becoming leader, secretly travelling on his diplomatic train to Beijing for talks with Chinese president Xi Jinping.

In April he announces the North is halting nuclear and missile tests as they are no longer needed and it is shutting down a test site.

Mr Trump reacts by saying he looks forward to meeting his North Korean counterpart in June at a summit they have agreed to.

The North indicates it is willing to give up its nuclear weapons.

Kim Jong Un becomes the first North Korean leader to cross into South Korean territory since the end of the Korean War when he meets Moon Jae-in in the DMZ.

Mr Trump later cancels the June summit, citing the "tremendous anger and open hostility" by the North.

But then just over a week later, the historic meeting in Singapore is back on following more high-level talks.

At the White House, senior North Korean official Kim Yong Chol delivers a letter from the country's leader to the US president.