本文主要探討東昏侯在位時期，戰爭對於政局的影響。東昏侯在即位之後就發動了北伐，而當時的朝堂上有齊高帝、武帝一系的高武舊將，與蕭寶卷所繼承的齊明帝一系。北伐是由高武舊將一系的陳顯達、崔慧景領導，而東昏侯一系的蕭衍也參與了這場戰爭。北魏方面則是由孝文帝御駕親征，這可見這場戰役的重要性。筆者以此戰發生於南鄉這地方，故本文稱之為「南鄉之役」。「南鄉之役」在史料的記載上有所缺漏，《南齊書》僅陳顯達列傳有敘述，崔慧景等人的列傳皆無描述，《魏書》又紀載了一些《南齊書》所沒有的記載，故而筆者撰寫此文加以釐清。「南鄉之役」後，蕭衍獲得了利益，然蕭衍之兄蕭懿之死，造成了東昏侯集團的分裂，進而東西相爭，最終蕭衍獲得郢州之役與建康之役的勝利，齊亡梁興。

This paper discusses the impact of political situation during the war of "Dong Hun Hou" period. After Dong Hun Hou ascended the throne, he launched the war against Bei wei. Dong Hun Hou 's inner cabinet included the old faction with those generals and officers who served previous Qi Gao Di/Qi Wu Di or Qi Ming Di and the new faction with those other generals and officers who were promoted by Dong Hun Hou. Xiao Bao Juan, Chen Xian Da, and Cui Hui Jing of the old faction and Xiao Yan participated in this war. In Bei Wei’s side, Xiaowen Di commanded in person. Such a fact shows the importance of this war, which is described as “Nan Xiang Battle” by the author of this paper according to where the battlefield is. There are a few books such as Nan Qi Shu and Wei Shu describing the Nan Xiang Battle but still insufficient. Therefore, this paper attempts to further find some missing pieces and the influences of the war. In summary, Nan Xiang Battle did split the cabinets of Dong Hun Hou 's party into rival factions and ultimately destroyed his own dynasty.