Abraham Lincoln issued the Emancipation Proclamation in:

The cotton gin was invented by:

The first permanent English settlement in America was:
The Bill of Rights consists of the first ___ amendments.

The 13th Amendment:
The Declaration of Independence was primarily written by:

The Louisiana Purchase (1803) doubled the size of the US. It was purchased from:

The US economic system is best described as:
The Great Plains are primarily used for:
The Battle of Gettysburg (1863) was important because:
