Electricity and magnetism
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.
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