ToGort’s left, behind a stout, inspired defence by Roden’s Cavalry Corps on theGette River, the Belgian infantry withdrew in good order to the ‘K-W Line’,manning a 31-mile front with eight divisions, backed up by three more,with another two on the Willebroek Canal and a reserve of cavalry and the 1stArdennes Division.
句中的with分句应该怎么样剖析（或者是不是符合常规语法）？是一个with复合结构吗？若是如此，and areserve of cavalry and the 1st Ardennes Division这个结构是和哪个并列？感觉和another two on the Willebroek Canal这个无动词分句结构不对等，前者也能看作是一个无动词分句吗？
期望老师解惑，谢谢！
现代语法把with复合结构剖析为with后接无动词分句，但这个句子with A and B and C，是三项并列，那样A，B，C应该是相同的结构，而B和C都是名词词组，所以A不适合剖析为无动词分句，而应该把on介词短语剖析为定语。
