A massive scientific and technological effort conducted at hidden laboratories that were charged with finding a way to create a nuclear weapon.

North Atlantic Treaty Organization (NATO) declared _________.

This battle was fought in Belguim.  Hitler wanted to split the Allied armies.  However, he failure to do so marked the last German offensive on the western front.  

Which was NOT an outcome of the Compromise of 1850?

This prohibited the states from discriminating against voters on the basis of race and, most importantly, gave the federal government power to supersede the state courts and prosecute of the law.

The First Battle of Bull Run dealt a severe blow to the Union morale and eliminated the hopes that the war would be quick and swift.

The assassination of President Abraham Lincoln _______________________________.

The United States Sanitary Commission __________________.  

At this conference held in February of 1945, the Big Three established guidelines for occupying Germany and forming democratic governments in nations liberated from Nazi control.

Only a very small minority of southern whites owned slaves.  Most white southerners were yeoman farmers, meaning they farmed their own small plots of land usually without the assistance of slaves.