303 BC
Encyclopedia
Year 303 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 Consulship of Lentulus and Aventinensis (or, less frequently, year 451 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 303 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.

Seleucid Empire

  • Seleucus I Nicator
    Seleucus I Nicator
    Seleucus I was a Macedonian officer of Alexander the Great and one of the Diadochi. In the Wars of the Diadochi that took place after Alexander's death, Seleucus established the Seleucid dynasty and the Seleucid Empire...

     expands his kingdom throughout Persia as far east as India
    India
    India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

    , but his advance is eventually halted by Chandragupta Maurya
    Chandragupta Maurya
    Chandragupta Maurya , was the founder of the Maurya Empire. Chandragupta succeeded in conquering most of the Indian subcontinent. Chandragupta is considered the first unifier of India and its first genuine emperor...

    , the founder of the Maurya dynasty of India. In a pact concluded by the two leaders, Seleucus agrees to territorial concessions in exchange for 500 war-trained elephants
    War elephant
    A war elephant was an elephant trained and guided by humans for combat. Their main use was to charge the enemy, trampling them and breaking their ranks. A division of war elephants is known as elephantry....

     .
  • Seleucus refounds the town of Orrhoa in northern Mesopotamia
    Mesopotamia
    Mesopotamia is a toponym for the area of the Tigris–Euphrates river system, largely corresponding to modern-day Iraq, northeastern Syria, southeastern Turkey and southwestern Iran.Widely considered to be the cradle of civilization, Bronze Age Mesopotamia included Sumer and the...

     as a military colony and mixes Greek settlers with its eastern population. He names Edessa
    Edessa, Mesopotamia
    Edessa is the Greek name of an Aramaic town in northern Mesopotamia, as refounded by Seleucus I Nicator. For the modern history of the city, see Şanlıurfa.-Names:...

     in memory of the ancient capital of Macedon
    Macedon
    Macedonia or Macedon was an ancient kingdom, centered in the northeastern part of the Greek peninsula, bordered by Epirus to the west, Paeonia to the north, the region of Thrace to the east and Thessaly to the south....

    .

Greece

  • Cassander
    Cassander
    Cassander , King of Macedonia , was a son of Antipater, and founder of the Antipatrid dynasty...

     and Lysimachus
    Lysimachus
    Lysimachus was a Macedonian officer and diadochus of Alexander the Great, who became a basileus in 306 BC, ruling Thrace, Asia Minor and Macedon.-Early Life & Career:...

     persuade Seleucus and Ptolemy
    Ptolemy I Soter
    Ptolemy I Soter I , also known as Ptolemy Lagides, c. 367 BC – c. 283 BC, was a Macedonian general under Alexander the Great, who became ruler of Egypt and founder of both the Ptolemaic Kingdom and the Ptolemaic Dynasty...

     to join them in trying to destroy Antigonus
    Antigonus I Monophthalmus
    Antigonus I Monophthalmus , son of Philip from Elimeia, was a Macedonian nobleman, general, and satrap under Alexander the Great. During his early life he served under Philip II, and he was a major figure in the Wars of the Diadochi after Alexander's death, declaring himself king in 306 BC and...

    .
  • Demetrius Poliorcetes occupies Corinth
    Corinth
    Corinth is a city and former municipality in Corinthia, Peloponnese, Greece. Since the 2011 local government reform it is part of the municipality Corinth, of which it is the seat and a municipal unit...

    , Sicyon
    Sicyon
    Sikyon was an ancient Greek city situated in the northern Peloponnesus between Corinth and Achaea on the territory of the present-day prefecture of Corinthia...

    , and 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...

     in the Peloponnese
    Peloponnese
    The Peloponnese, Peloponnesos or Peloponnesus , is a large peninsula , located in a region of southern Greece, forming the part of the country south of the Gulf of Corinth...

    , and Achaea
    Achaea
    Achaea is one of the regional units of Greece. It is part of the region of West Greece. It is situated in the northwestern part of the Peloponnese peninsula. The capital is Patras. The population exceeds 300,000 since 2001.-Geography:...

    , Elis
    Elis
    Elis, or Eleia is an ancient district that corresponds with the modern Elis peripheral unit...

     and almost all of Arcadia
    Arcadia
    Arcadia is one of the regional units of Greece. It is part of the administrative region of Peloponnese. It is situated in the central and eastern part of the Peloponnese peninsula. It takes its name from the mythological character Arcas. In Greek mythology, it was the home of the god Pan...

     join his side.

Italy

  • The citizens of Tarentum
    Taranto
    Taranto is a coastal city in Apulia, Southern Italy. It is the capital of the Province of Taranto and is an important commercial port as well as the main Italian naval base....

     seek the help of the 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...

    n general, Cleonymus. He is able to pacify the Lucanians with the agreement of the Romans
    Roman Republic
    The Roman Republic was the period of the ancient Roman civilization where the government operated as a republic. It began with the overthrow of the Roman monarchy, traditionally dated around 508 BC, and its replacement by a government headed by two consuls, elected annually by the citizens and...

    .

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