Constructed in 1917 and 1918 on the eastern edge of campus for the training of UNC students for service in the US military during World War One.
Their identification on maps is often mistaken for the defensive position(s) constructed by the retreating Confederate forces in 1865, although that site is located nearby the 1917-1918 training trenches.
All images courtesy UNC
Trench map 1918
Location of trenches, 1918 USGS topographic map excerpt