Not only the triads but the followers and members of the first Han dynasty put in their consent and effort to defeat Wang Mang. This led to the leadership to pass over in the hands of the Han Nobles Liu Xiu. He came to be known as Emperor Guang Wudi.
The second Han dynasty became prominent in foreign affairs. Though there wasn’t any much contribution of strategy and international policy. The migrant Huns into the southern region were the main leaders of the second Han dynasty and they contributed in integrating the empire.
The Hans endeavored to establish a widespread empire in which they wanted to incorporate the lands of the Turks as well. They started the campaign to capture the lands of these Turks and this lead to their monopoly in trade. This capturing was done at a fast pace especially when it was a transitionary phase of transfer of power.