Eastern Hemisphere in 200 BC. A millennium (pl millennia) is a period of Time equal to one thousand Years (from Latin la mille, thousand and la annum The 1st millennium BC encompasses the Iron Age and sees the rise of successive empires A century (from the Latin centum, meaning one hundred is One hundred consecutive Years Centuries are numbered ordinally (e The 4th century BC started the first day of 400 BC and ended the last day of 301 BC. The 3rd century BC started the first day of 300 BC and ended the last day of 201 BC The 2nd century BC started the first day of 200 BC and ended the last day of 101 BC. See also List of centuries, History This is a list of Decades in history including links to corresponding articles with more information about them Events and trends The Mauryan Empire reaches its peak Buddhism flourishes in India. Events and trends Qin Shi Huang, the king of Qin, unifies the warring states of China into a unified state in 221 BC. Events and trends The Second Punic War began when Hannibal conquered Saguntum, then led an army through southern Gaul and across Events and trends For Ptolemy V of Egypt the priests erected the "Decree of Memphis (Ptolemy V" the named Rosetta Stone. Events and trends Births Deaths Events and trends Births Deaths This page indexes the individual Years pages Twenty-first century Events By place Roman Republic The Romans under Fabius Maximus Cunctator capture Tarentum (modern Taranto Events By place Roman Republic The Romans under Publius Cornelius Scipio defeat the Carthaginians under their commander Events By place Roman Republic The Roman general Gaius Claudius Nero fights an indecisive battle with the Carthaginian Events By place Roman Republic In the Battle of Ilipa ( Alcalá del Río, near Seville) in Spain, the Events By place Seleucid Empire Returning via the Persian provinces of Arachosia, Drangiana, and Carmania Events By place Carthage Having lost his alliance with the Numidian chief Masinissa, the Carthaginian general Events By place Carthage The Roman general Publius Cornelius Scipio, while undertaking peace negotiations with the Carthaginians Events By place Carthage Accused of treason by the Carthaginians after being defeated by the Romans at the Battle of the Events By place Carthage On Hannibal 's advice Carthage sues for peace with the Romans, ending the Second Punic Events By place Seleucid Empire Antiochus III's forces continue their invasion of Coele Syria and Palestine.