123 BC Chr.

123 BC Chr.
Antiochus VIII defeats Alexander II Zabinas in the battle for the Seleucid Empire .
123 BC Chr. In other calendars
Buddhist calendar	421/422 (southern Buddhism); 420/421 (alternative calculation according to Buddha's Parinirvana )
Chinese calendar	42nd (43rd) cycle , Year of the Earth-Horse戊午 ( at the beginning of the year Fire-Snake 丁巳)
Greek calendar	1./2. Year of the 164th Olympiad
Jewish calendar	3638/39
Roman calendar	from urbe condita DCXXXI (631)
Seleucid era	Babylon: 188/189 (turn of the year April); Syria: 189/190 (turn of the year October)

Events

The Balearic Islands

Gaius Sempronius Gracchus becomes a Roman tribune for the first time and applies for the Leges Semproniae to continue the Gracchian reform of his brother Tiberius Sempronius Gracchus from the year 133 BC. Chr.
After the conquest of Gallia Narbonensis , Marcus Fulvius Flaccus returns to Rome in a triumphal procession .

Rome conquers the Balearic Islands . Quintus Caecilius Metellus Balearicus founds the cities of Pol lèntia (today Alcúdia ) and Palma (from Latin palma , palm of victory).

Gaius Sempronius Gracchus founds a Roman colony in Taranto ( colonia Neptunia ).

123 / v 122nd BC : The Lex iudiciaria , a law of Gaius Sempronius Gracchus , which reforms the judiciary of the Roman Republic in favor of the equestrian order and at the expense of the senators , is passed. However, whether this is one or more laws and whether this law (eswerk) includes the entire judicial system or only refers to the repetition procedure is still not clearly clarified in research.

The Seleucid ruler Antiochus VIII decisively defeats the usurper Alexander II Zabinas in the field battle. Alexander is caught on the run and executed a little later.