This particular fence is called a "worm fence" because of its' zig-zag formation. Sections of the newly-built fence are situated along the railroad tracks in Gettysburg National Military Park in Pennsylvania. The fences were reconstructed because Park Historians believed that similar fences existed in this location at the time of battle and they wanted to help visitors visualize and understand the important events that took place during that time (1863). Back then, such fences were used to divide fields and wood lots. They were quick and easy to build - no post hole digging required.
Soon after the fences (including the one pictured above) were erected (in early June of 2011), the Park began to receive questions from Civil War Historians about whether they were in the correct location. Recently, the Park decided to err on the side of caution and take the fencing down.
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