With his brother Archelochus and his cousin Aeneas, Acamas was lieutenant of the Dardanian contingent to assist King Priam.
 Along with Aeneas and Archelochus he led one of the five divisions attacking the Argive wall in the battle for the ships.
 Homer's "Iliad", Book 2.
 823 describes the troops of the Dardanians and its leaders: ""The Dardanians were led by brave Aeneas, whom Aphrodite bore to Anchises, when she, goddess though she was, had lain with him upon the mountain slopes of Ida.
 He was not alone, for with him were the two sons of Antenor, Archilokhos and Akamas, both skilled in all the arts of war."
"While in Book 16, Acamas avenged the death of his brother, who had been killed by Ajax, by slaying Promachus the Boeotian."But he knew well who it was, and the Trojans were greatly vexed with grief [akhos].
 Akamas then bestrode his brother's body and wounded Promakhos the Boeotian with his spear, for he was trying to drag his brother's body away.
 Akamas vaunted loudly over him saying, "Argive archers, braggarts that you are, toil [ponos] and suffering shall not be for us only, but some of you too shall fall here as well as ourselves.
 See how Promakhos now sleeps, vanquished by my spear; payment for my brother's blood has not long delayed; a man, therefore, may well be thankful if he leaves a kinsman in his house behind him to avenge his fall.""
Dido and Aeneas (Z. 626) is an opera in a prologue and three acts, written by the English Baroque composer Henry Purcell with a libretto by Nahum Tate.
 The dates of the composition and first performance of the opera are uncertain.
 It was composed no later than July 1688, and had been performed at Josias Priest's girls' school in London by the end of 1689.
 Some scholars argue for a date of composition as early as 1683.
 The story is based on Book IV of Virgil's "Aeneid".
 It recounts the love of Dido, Queen of Carthage, for the Trojan hero Aeneas, and her despair when he abandons her.
 A monumental work in Baroque opera, "Dido and Aeneas" is remembered as one of Purcell's foremost theatrical works.
 It was also Purcell's only true opera, as well as his only all-sung dramatic work.
 One of the earliest known English operas, it owes much to John Blow's "Venus and Adonis", both in structure and in overall effect.
 The influence of Cavalli's opera "Didone" is also apparent.
Rise and Fall of the City of Mahagonny (German: Aufstieg und Fall der Stadt Mahagonny ) is a political-satirical opera composed by Kurt Weill to a German libretto by Bertolt Brecht.
 It was first performed on 9 March 1930 at the Neues Theater in Leipzig.
Dido, Queen of Carthage is a short play written by the English playwright Christopher Marlowe, with possible contributions by Thomas Nashe.
 The story of the play focuses on the classical figure of Dido, the Queen of Carthage.
 It tells an intense dramatic tale of Dido and her fanatical love for Aeneas (induced by Cupid), Aeneas' betrayal of her and her eventual suicide on his departure for Italy.
 The playwrights depended upon Books 1, 2, and 4 of Virgil's "Aeneid" as their main source.
The plot is based on Virgil's "Aeneid" (Book 4 in particular), though Busenello, in his second libretto for Cavalli, replaces Dido's tragic suicide of Virgil with a happy ending in which Dido marries Iarbas, King of the Getuli, who saves Dido from herself after Aeneas abandons her.
 The action is divided into a prologue and 3 acts.
Dido, Queen of Carthage was an opera in three acts by Stephen Storace.
 Its English libretto by Prince Hoare was adapted from Metastasio's 1724 libretto, "Didone abbandonata" ("Dido Abandoned"), which had been set by many composers.
 Storace's opera premiered on 23 May 1792 at The King's Theatre in London combined with a performance of his masque, "Neptune's Prophecy".
 The story is based on that of Dido and Aeneas in the fourth book of Virgil's "Aeneid".
 The opera was not a success and was never revived after its original run of performances.
 The score has been lost.
Dido's Lament is the aria "When I am laid in earth" from the opera "Dido and Aeneas" by Henry Purcell (libretto by Nahum Tate).
Didone abbandonata ("Dido Abandoned") was an opera in three acts composed by Tomaso Albinoni.
 Albinoni's music (now lost) was set to Pietro Metastasio's libretto, "Didone abbandonata", which was in turn based on the story of Dido and Aeneas from the fourth book of Virgil's "Aeneid".
 The opera premiered on 26 December 1724 at the Teatro San Cassiano in Venice and was the first time that an opera based on a Metastasio libretto was performed in Venice.
The "Alabama Song"—also known as "Moon of Alabama", "Moon over Alabama", and "Whisky Bar"—is an English version of a song written by Bertolt Brecht and translated from German by his close collaborator Elisabeth Hauptmann in 1925 and set to music by Kurt Weill for the 1927 play "Little Mahagonny".
 It was reused for the 1930 opera "Rise and Fall of the City of Mahagonny" and has been notably covered by The Doors and David Bowie.
Mahagonny-Songspiel, also known as The Little Mahagonny, is a "small-scale 'scenic cantata'" written by the composer Kurt Weill and the dramatist Bertolt Brecht in 1927.
 Weill was commissioned in the spring to write one of a series of very short operas for performance that summer, and he chose to use the opportunity to create a "stylistic exercise" as preparation for a larger-scale project that they had begun to develop together (the two had met for the first time in March), their experimental 'epic opera' "The Rise and Fall of the City of Mahagonny" (1930).

Question: Are Dido and Aeneas and Rise and Fall of the City of Mahagonny both operas?
Answer: yes