阳火猴年 (male Fire-Monkey) −77 or −458 or −1230 — to — 阴火鸡年 (female Fire-Rooster) −76 or −457 or −1229
Year 204 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Cethegus and Tuditanus (or, less frequently, year 550 Ab urbe condita). The denomination 204 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.
Roman forces under Publius Cornelius Scipio besiege Utica in Carthaginia. Scipio is unable to stop the combined forces of the Carthaginians under Hasdrubal Gisco and the Numidians under their chief, Syphax, and he is forced to lift his siege of Utica.
Egypt
The late Egyptian King Ptolemy IV'sclique of favourites, led by Sosibius, Ptolemy's chief minister, keeps Ptolemy's death a secret, fearing retribution from the new king Ptolemy V's mother, Queen Arsinoe III. They arrange for the murder of Arsinoe, and then the five-year-old king is officially elevated to the throne with Sosibius as his guardian. Arsinoe has been popular with the Egyptian population so rioting follows the news of her assassination.
Han Xin completes the conquest of Zhao and receives the surrender of Yan. He captures the Zhao capital of Handan and defeats Chu relief forces sent by Xiang Yu.