A. is the correct answer.
Answer:
Periodization Should be your answer my freind.
The process of classifying the past into distinct periods of time is exactly Periodization.
The correct answer is A) on Union soil.
The Battle of Antietam/Sharpsburg is different from previous battles in the Civil War because it was the first battle on Union soil.
During the times of the American Civil War, the Battle of Antietam was fought on September 17, 1862, in Sharpsburg, Maryland. It was a hard-fought bloody battle that was decided in the end with a sound victory to the Union Army led by General George McClellan. Confederate leader Robert E. Lee was trying to invade the Union's territory, but a solid Army of the Potomac impeeded it.
Extreme conditions made it hard to establish routes connecting various region.
