Eliza is an opera in three acts by the composer Thomas Arne to an English libretto by Richard Rolt.

Although Eliza is highly patriotic in nature, the monarchy did not take kindly to the work and the opera was suppressed after one performance "by an Order from a superior Power".

[1] Arne's orchestration is quite progressive for its day, using strings, bassoons, oboes, trumpets, horns and drums; it also includes obbligato parts for piccolo, flute, descant recorder and cello.

Various friendly beings, including the "Genius of England", Peace, Liberty, Neptune, and various shepherds and shepherdesses, attempt to invigorate her; eventually her morale improves sufficiently that the group can defend their nation from the approaching Spanish Armada.

After the successful battle, the Genius of England sings the aria "We have fought, we have conquer'd", and the entire ensemble welcomes peace in the finale "Hail glory, like the morning star.