Why did the First Battle of Bull Run lead the Union to change its strategy?

What was one goal of the whig party

How does the supremacy clause of the u.s. constitution affect the states? o a. it requires each state to establish a supreme court. b. it declares that the federal government can take away state powers if necessary. o c. it allows state governments to overthrow the federal government if necessary. o d. it ensures that the u.s. constitution overrules each state constitution

How does the existence of a site like catus hill demonstrate the challenge that archaeologist face when making theories?