Why did the Confederates grow weaker during the US Civil War?

Answer 1

The Confederate armies fought valiantly, however, the North had a much large army and had an industrial base to keep its forces supplied. The smaller Southern population could not afford the casualties the North was able to absorb. Thus, the Southern armies grew weaker, even when victorious. Since the war was fought primarily in the South, the Confederate economy suffered as farms and their small industries became destroyed by invading Union armies.

Answer 2

Smaller population from which to replace casualties. Lack of industry for manufacturing war supplies. Much disagreement between generals. An inept Confederate president.