During the early years of his reign, the Kingdom of Zhao was constantly harassed by the
Donghu, the Linhu (Simplified and Traditional Chinese: 林胡), the Loufan (Simplified Chinese: 楼烦) and the
Beidi, all nomadic animal husbandry tribes. This might have been the inspiration for his later reforms. On another level, Wuling himself had been humbled after a great defeat by Qin. Previously, during 325-323 BC, he, along with the rulers of
Han,
Wei,
Yan and
Zhongshan, had declared himself king. However, in 318 BC, Zhao suffered a great defeat in the hands of Qin, causing Wuling to muse that since he did not have the power of a king, he should not use the title. In 307 BCE, Wuling started his reforms. Mostly military, they concentrated on making the military more suited to fighting battles. Up to that time, Zhao commanders riding on horseback still wore robes and normal court attire. Wuling ordered all commanders, including the whole court and military, to adopt the "Barbarian" Hu (胡) style of dress: pants, belt, boots, fur caps and fur clothes. Influenced by the nomads, he created a cavalry division in the army and trained them not only in the ways of a cavalry charge, but also in horse archery. While many reformists and officials supported the reforms, seeing it as a way to greatness and power, conservative members of the royal family such as Zhao Wuling's uncle Lord Cheng (Chinese: 公子成) disliked it, claiming that there should not be any "Copying of barbaric clothing and changing of old rules" (Chinese: "襲遠方之服, 變古之教"). Lord Cheng even went so far as to be absent from court. Wuling did much to check the opposition. He said, "There is not only one way to rule the world, nor is there any need to copy the old to benefit the country" (Chinese: "理世不必一道, 便國不必法古") and "Those who use the old to define the new do not achieve change" (Chinese: "以古制今者, 不達于事之變"). He wore the "barbaric" clothes on court and persuaded others to do the same. He even visited Lord Cheng and gave him a suit of the Hu people's clothing. Finally, Lord Cheng relented, and the controversy stopped. Wuling's reforms greatly improved the fighting capability of the Zhao military. The same year, the Zhao attacked the state of
Zhongshan and took several cities. In 306 BCE the Zhao military launched expeditions into the northern territories. The northern expedition was highly successful: the kings of the Loufan and Linhu surrendered and their territories became administered by a governor of
Dai. In the next year, parts of
Zhongshan were annexed. In 304 BCE the upper reaches of the
Yellow River were invaded and taken from the
Hu tribes like the
Hezong (Chinese: 河宗氏) and the
Xiu (Chinese: 休). In the conquered areas King Wuling created two prefectures in 302 BCE -
Yunzhong (Chinese: 雲中) and
Jiuyuan (Chinese: 九原). In a little over five years Zhao Wuling had expanded his country to the border with the
Yan, the
upper reaches of the Yellow River and into the north, and had forced the
Loufan (婁煩) and
Linhu (林胡) kings to submit to Zhao. King Wuling took control of their armies and added them to his military, creating extra divisions made up entirely of indigenous and hardy nomadic warriors. ==Abdication and death==