A daily track slip that reveals the everyday life of Han frontier soldiers

Among the vast sea of Han-Dynasty slips, one type of records feel especially vivid. In plain and simple words, they sketch the daily lives of frontier soldiers amid wind and sand: keeping watch for enemy movements, relaying beacon-fire signals, patrolling the “Heavenly Fields”… In this way, life on the frontier 2,000 years ago comes vividly to life on the slips.

Patrolling the “Heavenly Fields” was a daily duty for soldiers guarding the Han beacon towers. The so-called “Heavenly Fields” were stretches of sandy ground outside the Han Great Wall, managed by the garrison soldiers. Often several li in length, they were used to detect traces of enemy movement. The soldiers would clear away weeds, shrubs, and other surface growth, level the ground, and then cover it with fine sand. In this way, tracks would be left behind whenever a person or an animal passed through.

Each day, the garrison soldiers inspected the tracks in the Heavenly Fields at fixed times and smoothed the sand whenever needed. This was one of the most important frontier-defense systems of the Han Dynasty: the “daily track inspection system.”