Final answer:
The plays mentioned refer to Shakespeare's Histories, which mix tragedy and comedy while depicting the power struggles during England's 15th-century War of the Roses. A noticeable exception is 'Henry V', where the King is glorified.
Step-by-step explanation:
The series of plays mentioned in your question are likely Shakespeare's Histories. These plays, usually including Richard II, Henry IV Part 1, Henry IV Part 2, and Henry V, are distinct in the way they blend elements of tragedy and comedy. They address the political and familial conflict of England during the 15th century, a period recognized as 'The War of the Roses'. The plays largely discuss the power struggle between the noble families of Lancaster and York. An exception is the play 'Henry V', where Shakespeare turns away from internal disputes to glorify the king and England. This doesn't exclude the play from the themes of power struggle, but it does distinguish it from the others.
Learn more about Shakespeare's Histories