Capitalized, but not hyphenated: Commander in Chief
"commander-in-chief" is what you are looking for.
The second word should not be capitalized
Capitalise only if used as a formal title before a name, or at the beginning of a sentence, or as part of a title in a book (for instance). It is not hyphenated. Though you will often see hyphenation being used - but it is wrong.
Yes, "Commander in Chief" is considered a proper noun when it refers specifically to the title of the President of the United States or other leaders in similar roles. In this context, it is capitalized because it denotes a specific position of authority. However, when used generically to describe anyone in a similar role, it would not be capitalized.
Commander-in-chief commander in chief of the armed forces.
Oxford should always be capitalized as it is a proper noun.
commander-in-chief is a compound word meaning the highest ranking commander-- it is just one position. Commander and chief would indicate two separate functions and positions.
The President of the US is the Commander-in-Chief. Currently, President Obama is Commander-in-Chief.
The President of the US is the Commander-in-Chief. Currently, President Obama is Commander-in-Chief.
The President of the US is the Commander-in-Chief. Currently, President Obama is Commander-in-Chief.
Commander-In-Chief
The way you capitalize other words. If it's at the beginning of a sentence it should be capitalized. If it's not then it shouldn't be capitalized.