Why did the UN get involved in the Korean War?

I believe the answer to this question is to stop the spread of Communism. If South Korea was taken by China and North Korea, the "Dominoes" might start falling and other countries might want to become Communist. Great Britain, the USA, Australia, and other counties lend their support to stop this communist spread.

answer is :

many churches split during the movement.

new religions grew in popularity.

the emancipation proclamation was the aim of the war change to include the freeing of slaves in addition to preserving the union. the 13th amendment, which abolished slavery in the u.s. was passed on december 6th 1865.

as promised, lincoln waited to unveil the proclamation until he could do so with success from the union military advance. on september 22nd 1862, after a victory at antietam, he publicly announced a preliminary emancipation proclamation, declaring all slaves free in the rebellious states as of january 1st 1863.