The war was an inevitable product of the U.S. imperialists' internal and external policy.

After World War II, the balance of political forces of the world rapidly changed in favor of the democratic forces' holding of edge over the imperialist forces.

The Democratic People's Republic of Korea successfully enforced various democratic reforms and embarked on the road of socialism under the wise leadership of President Kim Il Sung, who achieved the historic cause of the country's liberation.

The then Soviet Union turned into a socialist power after winning the war against fascism.

A people's republic was founded in China in October 1949 and democratic reforms were enforced there.

Vietnam declared the founding of a democratic republic and strived to win the people's democracy.

Poland, Romania and other nations of Eastern Europe vigorously advanced towards socialism.

The global expansion of socialist forces, the growth of international democratic forces and the mounting struggle for national liberation in colonial countries threatened imperialism.

The U.S. imperialists plotted to bring about a fresh global war in a bid to reorganize the weak imperialist forces and contain the socialist forces.

Their first step was the Korean War.

The U.S. imperialists, which turned south Korea to a bridgehead of aggression on Asia and a strategic base for checking the movement for national liberation and socialism and holding world hegemony, ignited the war on June 25, 1950.