why was fort jefferson built
the building of the fort. After the War of 1812 a group of forts from Maine to Texas was envisioned to provide defense for the United States of America. Fort Jefferson was built to protect the southern coastline of the United States and the lifeline of commerce to and from the Mississippi River.The fort was planned to be the greatest of these. Fort Jefferson itself is a six-sided building constructed of 16 million handmade red bricks.fter the War of 1812 a group of forts from Maine to Texas was envisioned to provide defense for the United States of America. Fort Jefferson was built to protect the southern coastline of the United States and the lifeline of commerce to and from the Mississippi River. The fort was planned to be the greatest of these.