Final answer:
Oklahoma! is a Broadway musical written by Rodgers and Hammerstein. It premiered in 1943 and tells the story of a love triangle in the Western Indian Territory. It became a massive hit and has had a significant impact on musical theater.
Step-by-step explanation:
Oklahoma! is a Broadway musical that was written by Richard Rodgers and Oscar Hammerstein. It premiered in 1943 and became a massive hit, running for over five years and offering more than 2,200 performances. The musical tells the story of a love triangle set in the Western Indian Territory in the early 1900s. It features popular songs such as 'Oh, What a Beautiful Morning' and 'People Will Say We're in Love'. Oklahoma! has had a significant impact on musical theater and remains an important part of Broadway history.