In "The Pirates of Penzance" the Major General sings about "that infernal nonsense, Pinafore," referring to "H.M.S. Pinafore."
Mikado
Trial by Jury.
The Savoy operas were the original name for the operas of Sir Arthur Sullivan and W.S. Gilbert, aka Gilbert and Sullivan.
patience
Gilbert & Sullivan
It was about a ship named "HMS Pinafore" in the navy.
Patience.
The Yeomen of the Guard.
The pirates of Penzance. Very ribald and funny opera. Made fun of the British way of conducting the navy.
The Major-General's Song is a patter song from Gilbert and Sullivan's 1879 comic opera The Pirates of Penzance.
"The Mikado" is actually a comic opera, not a song, and it was written by the famous duo Gilbert and Sullivan. The opera, which premiered in 1885, features a libretto by W.S. Gilbert and music by Arthur Sullivan. It is set in Japan and satirizes British society and politics through its quirky characters and humorous plot.
I am guessing you mean 'The Mikado' by Gilbert and Sullivan. This is a comic opera and their ninth of fourteen operatic collaborations. It opened on 14th March 1885. By setting the opera in Japan Gilbert was able to satirize British politics and institutions more freely by disguising them as Japanese.