Firstly the caveat: my knowledge on the subject is still very limited, so please excuse it, if my question is wrong in its assumptions.
To my understanding, the southern states succeeded militarily quite well in the beginning of the war. However, over the longer term the material and economical strengths turned the tide more and more to North, which crushed the opponent militarily in the end. If this is very roughly right, what was the moment or battle, after which the advantage moved to the North and the South could no longer win? Or did the South ever have any chance of winning at all against the more industrial opponent?

首先声明:我对这方面的了解很少,如果我的问题有什么不对的地方,请谅解。
据我所知,在开战之初,南方各州的军事进展很顺利。不过从长期来看,北方的物质和经济实力更强,让形势慢慢偏向北方,最终击垮了对手。如果这是对的,那是什么时候,或者是哪场战役让优势转移到北方,让南方胜利无望的?或者说,南方是否曾经有机会战胜工业实力更强的北方?