There should be no justification of going to war unless the opposing side is harming your country and countrymen, economically, physically, or by isolating you. But as a politician anything that economically benefits my country would be justified if me going to a war. Taylor, had done the same during the Spanish American war by blaming Mexico of stealing Texas back, even though the land was Mexico's back then. He'd done it to enlarge America's land, Manifest Destiny. He spread the propaganda that Mexican troops attacked American, which emotionalism do Americans and they ended up backing up Taylor's decision of going on a war.
Answer:
umm...i think all of the above...
Explanation:
Americans used the ideal of manifest destiny to expand westward by buying the Louisiana purchase, then buying California and New Mexico and Texas from Mexico. As people moved westward due to the gold rush, people settled in this land, and popular sovereignty allowed a certain number of people to establish a state.
The answer is the Civil war. The Dred Scott case denied the legality of African American citizenship which caused outrage.
Pretty sure, it's B.Hindi