《旧唐书·列传·卷五》
高祖武德四年七月，刘黑闼在漳南县设置祭坛，祭奠窦建德，向他禀告造反报仇的心愿，自称大将军。
武德四年七月，设坛于漳南，祭建德，告以举兵之意，自称大将军。
In July of the fourth year of Gaozu Wude, Liu Heta set up an altar in Zhangnan County, offered sacrifices to Dou Jiande, reported his ambition to rebel and avenge him to him, and called himself a general.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 武德四年七月，设坛于漳南，祭建德，告以举兵之意，自称大将军。 [/INST] In July of the fourth year of Gaozu Wude, Liu Heta set up an altar in Zhangnan County, offered sacrifices to Dou Jiande, reported his ambition to rebel and avenge him to him, and called himself a general.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 武德四年七月，设坛于漳南，祭建德，告以举兵之意，自称大将军。
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In July of the fourth year of Gaozu Wude, Liu Heta set up an altar in Zhangnan County, offered sacrifices to Dou Jiande, reported his ambition to rebel and avenge him to him, and called himself a general.
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