What role did the ""domino theory"" play in the start of the korean war?

The actions and decisions during the cold war were the consequences of this theory.

Explanation:

Domino theory suggests fear and says that if a single country can attack and seize another country, then it has the potential to attack more countries.

For the USA: Since NK was communist and supported by Joseph Stalin of Soviet. America got worried that NK's win over South may help Soviet in spreading its communist ideology.

For China: When NK was invaded with the help of USA. China got worried that this victory may lead the US army towards them.

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.

here are some major conflicts i found. maybe pick one and do more research on it. (cause i ain't writing 6 paragraphs)

in 1877, the nez perce war took place.

1881 - president james garfield was assassinated.

1882 - the chinese exclusion act was passed.

1883 - a decision in the civil rights cases legalized racial segregation in the united states.

1887 - the dawes act was passed.

1893 - the panic of 1893 took place. (what a creative name)

and there are probably other topics you can find if you just search up "united states timeline," or "conflicts in the 19th century for america."

then once you find a topic you like find out how it affected the people of america and what not. (sorry if this feels a bit short changed, history was and never will be one of my strong topics)