Respuesta :
Abraham Lincoln learn as a result of the first battle of bull run that:
d) the south was stronger than I thought the war could take longer than I had expected
The defeat provoke the Union into mobilizing resources for a long war. Also the North had a larger army than the South, and was expecting an easy victory, which didn't happen, and Lincoln had to convoke more men to battle.
Answer:
d) the south was stronger than I thought the war could take longer than I had expected