Emperor Xiaowu of Liu Song

Emperor Xiaowu of Liu Song (劉宋孝武帝) (430–464), personal name Liu Jun (劉駿), courtesy name Xiulong (休龍), nickname Daomin (道民), was an emperor of the Chinese dynasty Liu Song. He was a son of Emperor Wen. After his older brother Liu Shao assassinated their father in 453 and took the throne, he rose in rebellion and overthrew Liu Shao. He was generally regarded as a capable, but harsh and sexually immoral emperor. He curtailed the powers of the officials and imperial princes greatly during his reign.

Liu Jun was born in 430, as Emperor Wen's third son. His mother, Consort Lu Huinan, was not one of Emperor Wen's favorite consorts, and he was also not much favored by his father. In 435, he was created the Prince of Wuling. In 439, at age nine, he was made the governor of Xiang Province (湘州, modern Hunan), and for the next several years he was rotated through the provinces, although he did not appear to be actually at all in charge until 445, when he was made the governor of Yong Province (雍州, modern northwestern Hubei and southwestern Henan), an important province militarily due to its location on the border with rival Northern Wei, and with Emperor Wen interested in recovering provinces lost to Northern Wei during the reign of his brother Emperor Shao, Yong was considered a key post. As his mother was not favored by the Emperor, she mostly accompanied him rather than stay at the palace in the capital Jiankang.

In 448, Liu Jun was made the governor of the equally important Xu Province (徐州, modern northern Jiangsu and northern Anhui), with its capital at Pengcheng, and it was there that he was involved in a major war between Liu Song and Northern Wei. In 450, with Emperor Wen's northern advances not only repelled by Emperor Taiwu of Northern Wei, but with Northern Wei troops under Emperor Taiwu attacking south in retaliation, Northern Wei troops quickly reached Pengcheng. Liu Jun's uncle Liu Yigong (劉義恭) the Prince of Jiangxia, the commander of the northern troops, wanted to abandon Pengcheng, at the suggestion of Zhang Chang (張暢), Liu Jun insisted on defending Pengcheng, and Liu Yigong gave up his plan to flee. Emperor Taiwu, after diplomatic parlaying at Pengcheng, continued advancing south, all the way to the Yangtze River, before withdrawing in 451. Despite holding Pengcheng, Liu Jun was slightly demoted after the war. (During the war, at the instigation of Liu Jun, his older brother Liu Shao the Crown Prince, and He Shangzhi (何尚之), Emperor Wen put his brother Liu Yikang, the former prime minister who had been deposed in 440, to death.) In 452, Liu Jun was sent to be the governor of South Yan Province (南兗州, modern central Jiangsu), and then of Jiang Province (江州, modern Jiangxi and Fujian).

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