Final answer:
General Douglas MacArthur was relieved of his command by President Truman during the Korean War for insubordination and going outside the chain of command.
Step-by-step explanation:
The individual who was relieved of his position because he went outside of the chain of command was General Douglas MacArthur. President Harry S. Truman, with the support of the Joint Chiefs of Staff, made the controversial decision to relieve MacArthur during the Korean War. Despite MacArthur's popularity and public protests supporting him, Truman's decision to remove him was based on MacArthur's insubordination and the principle of civilian control over the military, which he violated by communicating directly with the media and ignoring the established military hierarchy.