commander in chief
noun phraseDefinition of commander in chief
: one who holds the supreme command of an armed force
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“Commander in chief.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/commander%20in%20chief. Accessed 1 Dec. 2021.
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The first known use of commander in chief was in 1654
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