the United Nations forces, which protected South Korea from an invasion by North Korea.
The US is not permitted to patrol North Korea, nor do they. The US military does however have military bases in south Korea as part of a treaty to protect them against a possible attack by North Korea.
Korea
yes the united states was on south koreas side and the soviet union was on north koreas side
Because if the North over ran/took over the south there would have been another Communist country to worry about. also North were killing innocent people. remember THE UN / alot of nations were involved in Protecting the South Korea had been invaded in WWII by the Japenese. US forces occupied part of Korea helping the South Koreans recover from WWII. When North Korea invaded South Korea US forces assisted in their defense until UN Forces arrived as well as more US Military aid.
South Korea, US vs North Korea, USSR, China
Vietnam and Korea .
What was the US military policy that involved destroying Vietnamese villages?
The US and North Korea.
The US maintains a large military presence in South Korea as part of its commitment to the defense and security of its ally. The presence serves to deter aggression and provide a swift response to any potential threats to South Korea's security. It also helps maintain stability in the region and supports the US's broader strategic interests in East Asia.
Not an expert but overtly I do not think the US has a military presence in N. Korea. Covertly I am sure that there will be one or two spies there.
We got involved because of the Truman Doctrine which stated that the US would provide military and economic aid to countries threatened by communism. It also fell under the lines of Truman's containment policy.
They supported South Korea.