The line was marked by mile posts mounded and trenched. Pipelines at risk are not trenched, but remain on the seabed. In 1910 the perimeter was trenched and the present hedge of trees planted. The game was originally announced and released in North America as "Trenched". The vein carries along the hill for some considerable distance, and has been trenched out. Eventually, in 915, they were driven out from their trenched camp at Garigliano.