The Japanese offensive called 太原作戦 or the Battle of Taiyuan (Chinese: 太原會戰; pinyin: Tàiyuán Huìzhàn; Wade–Giles: T'ai-yüan Hui-tsan) was a major battle fought between China and Japan named for Taiyuan (the capital of Shanxi province), which lay in the 2nd Military Region. This battle concluded in loss for the NRA, including part of Suiyuan, most of Shanxi and their most modern arsenal at Taiyuan and effectively ended large-scale regular resistance in the North China area.

• http://en.wikipedia.org/wiki/Battle of Taiyuan