▼ The research focuses on significant historical events within the 125 years from Duke Xuan of Lu (é­¯å®£å¬)(608 B.C.)to Duke Ai of Lu(é­¯åå¬)(473B.C.) when the country of Wu(å³å) has fallen. The research includes lists and diagrams illustrating the battles. The research also clearly defines the diplomatic relations and the battle process. In the beginning, Chu is more powerful than Wu. Wu is ruled by Chu. However, Wu has a good chance to form an alliance with Jin(æå). The battle of Wu and Chu is a result of the power struggle between Jin and Chu. Wu has a geographical advantage over Chu and has diplomatic relation with Jin. Kings of Wu in successive dynasties select personnel wisely until King Helu of Wu (éå»¬ææ).This period demonstrates national prestige of Wu. Contrary to Wu, Chu grows weaker in time due to internal problems. Wuchen, Duke of Shen(ç³å¬å·«è£), joined Jin. And, Wu Zixu(ä¼å­è¥) is casted away to Wu. Because of the loss of manpower, Chu can not compete with Jin. Chu supports Yue(è¶å) and makes Yue compete with Wu. Wu is made to compete with Yue in the late Spring and Autumn period(æ¥ç§ææ). Wu being destroyed by Yue has a great influence on the late Spring and Autumn period.The key to the conflict between Wu and Chu is Battle of Boju. In the Battle of Boju(æèä¹æ°), Chu is defeated and, in turn, causes the loss of the city of YingYu(é¢é½) and the retreat of King Zhao of Chu(æ¥æ­ç). Winning the Battle of Boju is a great victory for Wu. Later, Qin(ç§¦å) sends troops to help Chu to defeat Wu. Wu is unstable at thistime and is forced to retreat. As for diplomatic strategies, Chu can not maintain the manpower. As compared to Chu, Wu has a slight advantage over Chu. King Fu Chai of Wu (å³çå¤«å·®) reaches his prime during the Huang Chi Meeting (é»æ± ä¹æ). As for the use of manpower, comparing King Helu and Fu Chai of Wu with the king and Lingyin of Chu(ä»¤å°¹), it can be seen that the wins and the losses between Wu and Chu are due to internal causes. The research includes geographical illustrations of battle areas. And, the dynamics of the battles between Wu and Chu around Yangtze River and Huai River Basin (é·æ±æ·®æ°´æµå)is analysed. Advisors/Committee Members: Wen-Ching Liu (committee member), Sheng-sung Huang (chair), Lee-Chun Lan (chair).