Zasechnaya cherta (, loosely translated as Great Abatis Line or Great Abatis Border) was a chain of fortification lines, created by Grand Duchy of Moscow and later the Tsardom of Russia to protect it from the raids of the Crimean Tatars who, rapidly moving along the Muravsky Trail, ravaged the southern provinces of the country during a series of the Russo-Crimean Wars. It also served as a border between the Muscovite State and the steppe nomads. As a fortification line stretching for hundreds kilometers, the Great Abatis Border is analogous to the Great Wall of China and the Roman Limes.