A Military Writer's Handbook
Punctuation

The Linking Comma

The linking comma, as its name implies, is used to link a series of words, phrases, or clauses in a sentence. Words and phrases so linked together produce more elaborate and precise definitions of objects, actions, and ideas:

Military culture is an amalgam of values, customs, and traditions that has created a shared institutional ethos.

Duty includes the concept of accountability to the chain of command, the civil authority, and the Canadian people.

Practice Exercises (12 questions)

Help! Two sentences (or independent clauses) that are related in meaning can be joined by a , andlogically called the "comma-and." (Or a comma can be used before another coordinating conjunction, such as but or so or yet, to join related sentences.) The "comma-and" performs the same function as a period or semicolon, indicating that one grammatical sentence is being combined with another. To test whether an and in the middle of a sentence needs to have a comma in front of it, cover up the and. If the words on either side of it make up complete sentences, then a "comma-and" is required.