这句话如何分析呢？

有一读者问： 有这样一句话：

Concealed in the forest at the bottom of that military rattrap in which half a hundred men in possession of the exits might have starved an army to submission, lay five regiments of Federal infantry.

如何作语法分析？

这句话是一倒装结构。其主语部分是 five regiments of Federal infantry， 谓语动词是lay, 过去分词concealed是一伴随状语， in the forest...to submission 是一地点状语，其中又含有一定语从句 in which half a hundred men...to submission, 用以修饰 that military rattrap。 这句话的基本结构是“倒装了的主语+谓语动词+伴随状语”。