So I have often wondered if there was a specific purpose behind zig-zagging the split rail fencing that is so common on Civil War battlefields. I have been to Gettysburg and went to Antietam/Sharpsburg yesterday, and saw these in quite a few places on the battlefield.
Yes …
No Need for Posts or Nails
Zig-zag (or "Virginia worm") fencing did not require vertical posts to be set in the ground, which was labor-intensive, especially in rocky or wooded terrain. The rails simply rested on each other in a stable interlocking pattern.
Quick and Easy Construction
The fence could be built quickly by just two people using locally available timber. This was especially valuable in frontier or wartime settings where resources, time, and labor were limited.
Stability Without Tools The zig-zag shape gave the fence lateral stability without needing fasteners like nails, which were expensive and not always available. The weight and angles of the rails held the structure together.
Easily Dismantled and Moved. The design made it easy to dismantle and move. Farmers and even soldiers during the Civil War could quickly take down a section to move livestock, reposition it, or use the wood for fire or fortification
Abundance of Wood
The pattern was wood-hungry, but in early America—especially in the South and along the Appalachian frontier—wood was abundant and cheap. Efficiency of material wasn't a priority.
Visual and Tactical Significance on Battlefields
By the Civil War, many of these fences already dotted the landscape. On battlefields like Gettysburg or Antietam, they became unintentional obstacles for advancing troops and markers for lines of engagement. Soldiers even used them for cover!