When the Hussite army faced a numerically superior opponent, the Bohemians usually formed a square of the armed wagons, joined them with iron chains, and defended the resulting fortification against charges of the enemy. Such a camp was easy to establish and practically invulnerable to enemy cavalry. The etymology of the word tabor may come from the Hussite fortress and modern day Czech city of Tábor, which itself is a name derived from biblical Jezreel mountain Tavor (in Hebrew תבור).