Year 127 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Ravilla and Cinna (or, less frequently, year 627 Ab urbe condita) and the Second Year of Yuanshuo. The denomination 127 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
|Millennium:||1st millennium BC|
|Gregorian calendar||127 BC|
|Ab urbe condita||627|
|Ancient Egypt era||XXXIII dynasty, 197|
|- Pharaoh||Ptolemy VIII Physcon, 19|
|Ancient Greek era||163rd Olympiad, year 2|
|Balinese saka calendar||N/A|
|Chinese calendar||癸丑年 (Water Ox)|
2570 or 2510
— to —
甲寅年 (Wood Tiger)
2571 or 2511
|Coptic calendar||−410 – −409|
|Ethiopian calendar||−134 – −133|
|- Vikram Samvat||−70 – −69|
|- Shaka Samvat||N/A|
|- Kali Yuga||2974–2975|
|Iranian calendar||748 BP – 747 BP|
|Islamic calendar||771 BH – 770 BH|
|Minguo calendar||2038 before ROC|
|Seleucid era||185/186 AG|
|Thai solar calendar||416–417|
0 or −381 or −1153
— to —
1 or −380 or −1152
- January: Emperor Wu of Han begins a policy of pressuring the client kings of the Han Dynasty into dividing their kingdoms. Previously, only the eldest son would inherit a kingdom. However, in an edict, Wu permits the kings of Liang and Chengyang to divide the land of their states and distribute the land to their younger brothers. Wu grants these brothers titles and promises to do the same if other kings grant land to younger brothers and younger sons. This precedent pressures other kings to do likewise, and Wu places the younger brothers and younger sons under the jurisdiction of the imperial prefectures.
- Wei Qing defeats a Xiongnu army near Gaoque. He then invades the Ordos Plateau, defeats the Xiongnu and their Baiyang and Loufan allies in the battles of Puni and Fuli, and then defeats the main Xiongnu force. The conquered territory becomes Shuofang Commandery. Wu orders the foundation of Shuofang City, and the system of defenses that had been built by the Qin Dynasty general Meng Tian are repaired.
- The Han rationalize the northern frontier, abandoning the remote region of Zaoyang to the Xiongnu.
- Hung, Hing Ming (2020). The Magnificent Emperor Wu: China's Han Dynasty. pp. 138–139. ISBN 978-1628944167.
- Hung, Hing Ming (2020). The Magnificent Emperor Wu: China's Han Dynasty. pp. 140–141. ISBN 978-1628944167.
- Hung, Hing Ming (2020). The Magnificent Emperor Wu: China's Han Dynasty. p. 140. ISBN 978-1628944167.