Which composer is behind the famous soundtrack used for the first fight scene in the 1979 film 'Apocalypse Now'?

Explanation

Richard Wagner was a big 19th century German composer. 'The Ride of the Valkyries' from his opera "The Valkyrie" is one of his most famous pieces, and it has been used in several films, of which the most famous is probably 'Apocalypse Now'.