Year 419 BC was a year of the pre-Julian Roman calendar

Roman calendar

The Roman calendar changed its form several times in the time between the founding of Rome and the fall of the Roman Empire. This article generally discusses the early Roman or pre-Julian calendars...

. At the time, it was known as the Year of the Tribunate of Lanatus, Rutilus, Tricipitinus and Axilla (or, less frequently, year 335 Ab urbe condita

Ab urbe condita

Ab urbe condita is Latin for "from the founding of the City ", traditionally set in 753 BC. AUC is a year-numbering system used by some ancient Roman historians to identify particular Roman years...

). The denomination 419 BC for this year has been used since the early medieval period, when the Anno Domini

Anno Domini

and Before Christ are designations used to label or number years used with the Julian and Gregorian calendars....

 calendar era

Calendar era

A calendar era is the year numbering system used by a calendar. For example, the Gregorian calendar numbers its years in the Western Christian era . The instant, date, or year from which time is marked is called the epoch of the era...

 became the prevalent method in Europe for naming years.

Greece

• Despite the Peace of Nicias
  Peace of Nicias
  The Peace of Nicias was a peace treaty signed between the Greek city-states of Athens and Sparta in the March of 421 BC, ending the first half of the Peloponnesian War....
  
   still being in effect, Sparta
  Sparta
  Sparta or Lacedaemon, was a prominent city-state in ancient Greece, situated on the banks of the River Eurotas in Laconia, in south-eastern Peloponnese. It emerged as a political entity around the 10th century BC, when the invading Dorians subjugated the local, non-Dorian population. From c...
  
  's King Agis II
  Agis II
  Agis II was the 17th Eurypontid king of Sparta, the eldest son of Archidamus II by his first wife, and half-brother of Agesilaus II. He ruled with his Agiad co-monarch Pausanias....
  
   gathers a strong army at Philus and descends upon Argos
  Argos
  Argos is a city and a former municipality in Argolis, Peloponnese, Greece. Since the 2011 local government reform it is part of the municipality Argos-Mykines, of which it is a municipal unit. It is 11 kilometres from Nafplion, which was its historic harbour...
  
   by marching at night from the north. His allied Boeotian forces fail him, but he is able to conclude a treaty with Argos.

Drama

• Euripides
  Euripides
  Euripides was one of the three great tragedians of classical Athens, the other two being Aeschylus and Sophocles. Some ancient scholars attributed ninety-five plays to him but according to the Suda it was ninety-two at most...
  
  ' play Andromache
  Andromache (play)
  Andromache is an Athenian tragedy by Euripides. It dramatises Andromache's life as a slave, years after the events of the Trojan War, and her conflict with her master's new wife, Hermione. The date of its first performance is unknown, although scholars place it sometime between 428 and 425 BC...
  
   is performed.
• Sophocles
  Sophocles
  Sophocles is one of three ancient Greek tragedians whose plays have survived. His first plays were written later than those of Aeschylus, and earlier than or contemporary with those of Euripides...
  
  ' play Electra
  Electra (Sophocles)
  Electra or Elektra is a Greek tragedy by Sophocles. Its date is not known, but various stylistic similarities with the Philoctetes and the Oedipus at Colonus lead scholars to suppose that it was written towards the end of Sophocles' career.Set in the city of Argos a few years after the Trojan...
  
   is performed. The play takes its theme from The Libation Bearers by 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"...
  
  .