Final answer:
The use of the rifled musket during the Civil War increased the size of the killing field and made larger defense efforts necessary, but it did not make trenches obsolete.
Step-by-step explanation:
The subject of this question is History and it pertains to the use of the rifled musket during the Civil War.
The rifled musket had a significant impact on the tactics and warfare during the Civil War. It increased the size of the killing field as its improved range and accuracy allowed soldiers to engage each other from much further distances. This meant that both sides had to spread out their lines over a wider area, resulting in a larger battlefield.
While it did not make trenches obsolete, the use of the rifled musket did change the nature of defensive strategies. Soldiers had to dig trenches and build fortifications to protect themselves from the increased range and accuracy of the rifled musket, making it more important than ever to invest in larger defense efforts.
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