that he would next cross the Yellow River and head for the Former Liang capital Guzang (姑臧, in modern Wuwei, Gansu), but instead was intending to intimidate the Former Liang leader Zhang Mao (then carrying the Jin-created title Duke of Xiping) into submission. Zhang was indeed intimidated and submitted to Han Zhao suzerainty. Liu Yao created him the Prince of Liang. Later that year, Liu Yao's son Liu Yin, who had been a slave with the Heiniyuju tribe, because Chen had been defeated, revealed his identity to the chief, who was surprised and respectfully delivered Liu Yin back to Liu Yao. (It is not clear where Heiniyuju was or why Liu Yin waited until Chen's defeat to reveal his identity to the chief; it could have been that Heiniyuju was initially a Chen ally, and while Chen was, prior to his rebellion, nominally a Han Zhao general, Liu Yin might have been concerned about being detained by Chen as a bargaining chip.) Liu Yao considered making Liu Yin his crown prince instead (since Liu Yin had previously been his heir), but, not having the heart to depose Liu Xi, the son of Empress Yang (who died earlier that year), and particularly because Liu Yin personally declined and did not wish to replace his brother, Liu Yao left Liu Xi as crown prince and created Liu Yin the Prince of Yong'an with special honors. Late reign In 324, the first real battle between Later Zhao and Han Zhao occurred at Xin'an (新安, in modern Luoyang, Henan), ushering an era in which Later Zhao and Han Zhao would continuously battle for years. In 325, their armies fought a major battle near Luoyang (which the two, as well as Jin, had fought over for months), and after some initial Han Zhao successes, Later Zhao's general Shi Hu decisively defeated and captured Han Zhao's general Liu Yue (劉岳), after Liu Yao himself encountered difficulties with his army discipline and could not come to Liu Yue's aid. Later Zhao took this opportunity to effectively take the modern central Henan, northern Jiangsu, and western Shandong under its control. Later in 325, Liu Yao created Liu Yin the Prince of Nanyang and further bestowed on him the title of Grand Chanyu, putting Wu Hu tribal forces under his command. He also created a second empress, Empress Liu. In 326, Empress Liu died, and according to her wishes,