Why is the korean war an example of a proxy war?

a north korea received military aid from the united states, while
china sent troops to south korea, even though the united states
and china weren't at war.

b. the soviet union sent troops to support the communist
government of north korea, even though the united states had
asked it not to

c. the united states supported south korea, while china backed
north korea, even though the united states and china didn't fight
each other directly

d. the united states supported a military coup that overthrew the
government in south korea, even though that government had
been democratically elected.

i think it should be slowed colonial western march

gaius cassius longinus and marcus junius brutus, former enemies of julius caesar who'd joined the roman senate, led caesar's assassination, dubbing themselves "the liberators." and the second one is   the assassination of julius caesar was the result of a conspiracy by many roman senators led by gaius cassius longinus, decimus junius brutus albinus, and marcus junius brutus. they stabbed caesar (23 times) to death in a location adjacent to the theatre of pompey on the ides of march 15 march 44 bc.

answer; i believe the above statement is (true);

jewish people, gypsies, and political opponents.