Question: When did the owner of Bucephalus die?

Knowledge 1: Alexandria Bucephalous
Alexandria Bucephalous (also variously known as Alexandria Bucephalus, Alexandria Bucephala, Bucephala, or Bucephalia), was a city founded by Alexander the Great in memory of his beloved horse Bucephalus. Founded in May 326 BC, the town was located on the Hydaspes (Jhelum River), east of the Indus River. Bucephalus had died after the Battle of the Hydaspes in 326 BC. The garrison was settled with Greek and Iranian veterans and Pauravas locals. It had large dockyards, suggesting it was intended as a center of commerce. [SEP] Knowledge 2: Hellenistic period
The Hellenistic period covers the period of ancient Greek (Hellenic) history and Mediterranean history between the death of Alexander the Great in 323 BC and the emergence of the Roman Empire as signified by the Battle of Actium in 31 BC and the subsequent conquest of Ptolemaic Egypt the following year. At this time, Greek cultural influence and power was at its peak in Europe, Africa and Asia, experiencing prosperity and progress in the arts, exploration, literature, theatre, architecture, music, mathematics, philosophy, and science. For example, competitive public games took place, ideas in biology, and popular entertainment in theaters. It is often considered a period of transition, sometimes even of decadence or degeneration, compared to the enlightenment of the Greek Classical era. The Hellenistic period saw the rise of New Comedy, Alexandrian poetry, the Septuagint and the philosophies of Stoicism and Epicureanism. Greek Science was advanced by the works of the mathematician Euclid and the polymath Archimedes. The religious sphere expanded to include new gods such as the Greco-Egyptian Serapis, eastern deities such as Attis and Cybele and the Greek adoption of Buddhism.
Knowledge 1: BTR-4
The BTR-4 "Bucephalus" (BTR; / Bronetransporter, literally Armoured Transporter) is an amphibious 8x8 wheeled armoured personnel carrier (APC) designed in Ukraine by the Kharkiv Morozov Machine Building Design Bureau (SOE KMDB) as a private venture. The prototype, which was designed as a private venture, was unveiled at the Aviasvit 2006 exhibition held in Ukraine in June 2006. It is currently operated by Iraq, Kazakhstan, Nigeria, and Ukraine, with up to 500 vehicles produced for all operators. It is availible in multiple different configurations, including but not limited to an ambulance, armoured recovery vehicle, and infantry support version. They have seen action in both the War in Donbass, and the capture of Jurf Al Nasr from ISIL. [SEP] Knowledge 2: Dice
Opposite sides of a modern die traditionally add up to seven, implying that the 1, 2 and 3 faces share a vertex. The faces of a die may be placed clockwise or counterclockwise about this vertex. If the 1, 2 and 3 faces run counterclockwise, the die is called ``right - handed '', and if those faces run clockwise, the die is called`` left - handed''. Western dice are normally right - handed, and Chinese dice are normally left - handed.
Knowledge 1: Hellenistic period
The Hellenistic period covers the period of ancient Greek (Hellenic) history and Mediterranean history between the death of Alexander the Great in 323 BC and the emergence of the Roman Empire as signified by the Battle of Actium in 31 BC and the subsequent conquest of Ptolemaic Egypt the following year. At this time, Greek cultural influence and power was at its peak in Europe, Africa and Asia, experiencing prosperity and progress in the arts, exploration, literature, theatre, architecture, music, mathematics, philosophy, and science. For example, competitive public games took place, ideas in biology, and popular entertainment in theaters. It is often considered a period of transition, sometimes even of decadence or degeneration, compared to the enlightenment of the Greek Classical era. The Hellenistic period saw the rise of New Comedy, Alexandrian poetry, the Septuagint and the philosophies of Stoicism and Epicureanism. Greek Science was advanced by the works of the mathematician Euclid and the polymath Archimedes. The religious sphere expanded to include new gods such as the Greco-Egyptian Serapis, eastern deities such as Attis and Cybele and the Greek adoption of Buddhism. [SEP] Knowledge 2: Dice
Opposite sides of a modern die traditionally add up to seven, implying that the 1, 2 and 3 faces share a vertex. The faces of a die may be placed clockwise or counterclockwise about this vertex. If the 1, 2 and 3 faces run counterclockwise, the die is called ``right - handed '', and if those faces run clockwise, the die is called`` left - handed''. Western dice are normally right - handed, and Chinese dice are normally left - handed.

Answer: 323 BC