I think the battle of Gettysburg.
please vote my answer brainliest. thanks!
Answer: Reports of the fabled Seven Golden Cities of Cíbola brought the first European explorers into New Mexico in 1540, led by the Spanish adventurer Francisco Vásquez de Coronado. The journey proved fruitless, however, and they soon returned to New Spain (Mexico).
Explanation: Hope this helps :)
The North believed that preserving the Union was of utmost importance. The South favored states' rights. Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.