What was fort sumter ?

Fort Sumter is a sea fort built on an artificial island protecting Charleston, South Carolina, from naval invasion. Its origin dates to the War of 1812 when the British invaded Washington by sea. It was still incomplete in 1861 when the Battle of Fort Sumter began the American Civil War.

Explanation:

Fort Sumter is a sea fort built on an artificial island protecting Charleston, South Carolina, from naval invasion. Its origin dates to the War of 1812 when the British invaded Washington by sea. It was still incomplete in 1861 when the Battle of Fort Sumter began the American Civil War.

Explanation:

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain