Answer:
"The Battle of Antietam was one of the most important events of the American Civil War. ... The battle ended the Confederate invasion of Maryland in 1862 and resulted in a Union victory. It also led to President Abraham Lincoln issuing the Preliminary Emancipation Proclamation on September 22, 1862."
The Mexican Cession (Spanish: Cesión mexicana) is the region in the modern-day southwestern United States that Mexico ceded to the U.S. in the Treaty of Guadalupe Hidalgo in 1848 after the Mexican–American War.
Gold and silver we're two benefits but they really wanted more territory control.
Frederick who? Frederick the Great, the most famous one?
He's associated with Prussia, which covers part of modern-day Germany
