阳土马年 (male Earth-Horse) −115 or −496 or −1268 — to — 阴土羊年 (female Earth-Goat) −114 or −495 or −1267
Year 242 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Catulus and Albinus (or, less frequently, year 512 Ab urbe condita). The denomination 242 BC for this year has been used since the early medieval period, when the Anno Dominicalendar era became the prevalent method in Europe for naming years.
The destruction of the Egyptian fleet by the Macedonians ends the naval supremacy of the Ptolemies but does not force them to relinquish their territories in Syria and the Aegean Sea.
China
The Qin general Meng Ao annexes 20 towns and cities from the State of Wei, conquering the cities of Suanzao, Yan, Xu, Changping, Yongqiu and Shanyang. He then establishes the Dongjun Commandery.
The Zhao general Pang Nuan defeats the army of the State of Yan and kills its general Chu Xin.[1]