《旧五代史·后周·列传五》
成年后凭骁勇果敢应征入伍，开始时归于后唐庄宗帐下，与后梁军队经历一百多场战斗，因功升任马直军使。
弱冠以骁果应募，始隶于庄宗帐前，与大梁兵经百余战，以功迁马直军使。
As an adult, he joined the army with his bravery and decisiveness. At first, he belonged to the camp of Zhuangzong of Hou Tang and fought more than 100 battles with the army of Hou Liang, and was promoted to the rank of Ma Zhijun Shi due to his meritorious service.
<s>[INST] Kindly elucidate the central themes in this passage in English: 弱冠以骁果应募，始隶于庄宗帐前，与大梁兵经百余战，以功迁马直军使。 [/INST] As an adult, he joined the army with his bravery and decisiveness. At first, he belonged to the camp of Zhuangzong of Hou Tang and fought more than 100 battles with the army of Hou Liang, and was promoted to the rank of Ma Zhijun Shi due to his meritorious service.</s>
Kindly elucidate the central themes in this passage in English: 弱冠以骁果应募，始隶于庄宗帐前，与大梁兵经百余战，以功迁马直军使。
user
As an adult, he joined the army with his bravery and decisiveness. At first, he belonged to the camp of Zhuangzong of Hou Tang and fought more than 100 battles with the army of Hou Liang, and was promoted to the rank of Ma Zhijun Shi due to his meritorious service.
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