In Greek mythology

Greek mythology

Greek mythology is the body of myths and legends belonging to the ancient Greeks, concerning their gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices. They were a part of religion in ancient Greece...

, Eteoclus was the son of Iphis

Iphis

Iphis was a name attributed to three individuals:-Daughter of Ligdus :According to Greek mythology and the Roman poet Ovid, who wrote about transformations in his Metamorphoses, Iphis was the daughter of Telethusa and Ligdus in Crete. Ligdus had already threatened to kill his pregnant wife's...

. He participated in the attack on Thebes by the Seven Against Thebes

Seven Against Thebes

The Seven against Thebes is the third play in an Oedipus-themed trilogy produced by Aeschylus in 467 BC. The trilogy is sometimes referred to as the Oedipodea. It concerns the battle between an Argive army led by Polynices and the army of Thebes led by Eteocles and his supporters. The trilogy won...

.

In Aeschylus

Aeschylus

Aeschylus was the first of the three ancient Greek tragedians whose work has survived, the others being Sophocles and Euripides, and is often described as the father of tragedy. His name derives from the Greek word aiskhos , meaning "shame"...

' play Seven Against Thebes

Seven Against Thebes

The Seven against Thebes is the third play in an Oedipus-themed trilogy produced by Aeschylus in 467 BC. The trilogy is sometimes referred to as the Oedipodea. It concerns the battle between an Argive army led by Polynices and the army of Thebes led by Eteocles and his supporters. The trilogy won...

, Eteoclus is one of the seven champions who attack Thebes' seven gates. He bears a man scaling a tower with a ladder on his shield, and attacks the Neistan gates.

However, in the Phoenician Women

Phoenician Women

The Phoenician Women is a tragedy by Euripides, based on the same story as Aeschylus' play Seven Against Thebes. The title refers to the Greek chorus, which is composed of Phoenician women on their way to Delphi who are trapped in Thebes by the war...

, Eteoclus is not one of the seven who attack Thebes. Instead, he withdraws after seeing that Zeus

Zeus

In the ancient Greek religion, Zeus was the "Father of Gods and men" who ruled the Olympians of Mount Olympus as a father ruled the family. He was the god of sky and thunder in Greek mythology. His Roman counterpart is Jupiter and his Etruscan counterpart is Tinia.Zeus was the child of Cronus...

 is displeased with the attackers, and Adrastus

Adrastus

Adrastus or Adrestus , traditionally translated as "nonparticipant" or "uncooperative", was a legendary king of Argos during the war of the Seven Against Thebes.-Mythological tradition:...

 replaces him at the gate. Other authors, among them Diodorus, Statius

Statius

Publius Papinius Statius was a Roman poet of the 1st century CE . Besides his poetry in Latin, which include an epic poem, the Thebaid, a collection of occasional poetry, the Silvae, and the unfinished epic, the Achilleid, he is best known for his appearance as a major character in the Purgatory...

, and Hyginus

Gaius Julius Hyginus

Gaius Julius Hyginus was a Latin author, a pupil of the famous Cornelius Alexander Polyhistor, and a freedman of Caesar Augustus. He was by Augustus elected superintendent of the Palatine library according to Suetonius' De Grammaticis, 20...

, agree with this list of attackers.