they had four 200-pounder parrets. there were a lot of places there were some vacant platforms. 11 vacant platforms. as they reconstructed some of these forts, he decided that new guns would go in and help cover this. fortifications did change. i told you we would stop and i would show you what some of the -- your plans for the system ofions, the fortifications did change over the war. i told you we would stop and i would show you what some of the 360 degree angle guns look like. the carriage is a little bit different. you notice the bottom. that gun could be turned 360 degrees. you can fire if the gun is mounted on the parapet. you're only going to one about you're only going to want about 180 degrees. but it could be fired the other way if needed. but you can see the abatee. the pointed stakes on the outside. it is in the ditch on the outside of the parapet to keep enemies from coming in. but you can see that it is clear, field of fire in front. this is fort stevens, which is one of the many forts in the defenses of