structural:summarization, structural:expansion
Solidifying power

Knowing that the conservative noble classes occupied every level of the Han court, Emperor Wu changed his strategy. He secretly recruited a circle of young loyal supporters from ordinary backgrounds and promoted them to middle-level positions in order to infiltrate executive ranks in the government. These newly established officials, known as the "insider court" (内朝), took orders and reported directly to Emperor Wu. They had real influence over the operation of government affairs though lower in rank. They became a powerful counter against the "outsider court" (外朝) made up of the Three Lords and Nine Ministers that, at the time, were mostly composed of anti-reformists. Furthermore, Emperor Wu sent out nationwide edicts appealing to grassroots scholars such as Gongsun Hong to enrol in government services in an attempt to break the stranglehold that the older-generation noble class had on the nation's levers of power.

In 138 BC, the southern autonomous state of Minyue (in modern-day Fujian) invaded the weaker neighbouring state of Dong'ou (in modern-day Zhejiang). After their king Zuo Zhenfu (驺贞复) died on the battlefield, the battered Dong'ou desperately sought help from the Han court. After a heated court debate over whether to offer military intervention for such a distant vassal state, Emperor Wu dispatched a newly promoted official Yan Zhu (严助) to Kuaiji (then still located in Suzhou, rather than Shaoxing) to mobilize the local garrison. However the tiger tally, which was needed to authorize any use of armed forces, was in Grand Empress Dowager Dou's possession at the time. Yan Zhu, as the appointed imperial ambassador, circumvented this problem by executing a local army commander who refused to obey any order without seeing the tiger tally and coerced the governor of Kuaiji to mobilize a large naval fleet to Dong'ou's rescue. Seeing that superior Han forces were on the way, Minyue forces became fearful and retreated. This was a huge political victory for Emperor Wu and set the precedent of using the Emperor's decrees to bypass the tiger tally, removing the need for cooperation from his grandmother; Of course, this did not mean that Grand Empress Dowager Dou's influence and intervention would disappear, she was a serious and insurmountable obstacle and competing authority in administration for Emperor Wu until the end of her life. But now with the military firmly in his control, Emperor Wu's political survival was assured, and his grandmother or anyone else could no longer threaten to dethrone him as directly, easily and quickly as before.

In the same year, Emperor Wu's newly favoured concubine Wei Zifu became pregnant with his first child, effectively clearing his name and silencing any political enemies who had schemed to use his alleged infertility as an excuse to have him removed. When this news reached the state of Huainan, Liu An, who was hoping the young Emperor Wu's infertility would allow him to ascend to the throne, went into a state of denial and rewarded anyone who told him that Emperor Wu was still childless.

In 135 BC, Grand Empress Dowager Dou died, removing the last major obstacle against Emperor Wu's ambition for reform.