《宋史·列传·卷十八》
部队回师，继忠任殿后，行军阵法严整。
师还，继忠为后殿，行列甚整。
The army returned, and Jizhong served as the rear guard, with strict military formation.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 师还，继忠为后殿，行列甚整。 [/INST] The army returned, and Jizhong served as the rear guard, with strict military formation.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 师还，继忠为后殿，行列甚整。
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The army returned, and Jizhong served as the rear guard, with strict military formation.
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