 Complete the following phrase:  In 18071809 the fort was completely rebuilt with masonry, with a capacity of 30 guns and barracks for two companies, as part of the second system of US fortifications. The defensive sea wall was reinforced to reach 12 feet high and 20 feet thick. The eastern and northern inland-facing sides continued to mimic a star fort. A ravelin was added on the east side of the fort to further reinforce the fort in preparation of a land assault. Additionally, this provided needed protection to the Officers Quarters building, used as the Shell House during the Civil War which also served as the center part the eastern perimeter wall. The forts armament included nine 18-pounder cannons with large quantities of gunpowder, shot, and shell. Although Fort Norfolk itself never saw conflict, it was in operation during the War of 1812. An elongated chain was stretched from Fort Norfolk to Fort Nelson in order to prevent the British Fleet from attacking Gosport Navy Yard, Norfolk, andor Portsmouth. During the War of 1812, soldiers stationed at Fort Norfolk were sent to reinforce the defense at Craney Island and took part in the Battle of Craney Island. Although the British were repulsed in that battle and did not enter Norfolk, they proceeded up Chesapeake Bay to burn Washington, D.C. and unsuccessfully 