胸墙

yǒu jǐ gè shì bīng jù zài xiōng qiáng biān shang guān kàn qián miàn fā shēng le shén me shì

有几个士兵聚在胸墙边上观看前面发生了什么事。

Several soldiers gathered together at the earthwork, looking at what was being done in front.