Battles of the Middle Ages in Poland - not counting such battles as Battle of Legnica, Battle of Grunwald, Battle of Varna or the last Battle of Orsha - were not large fights, and most of them can be called skirmishes rather than battles. However, the Crimean Tatars and the Turks simultaneously attacked Polish-Lithuanian frontier, at one time reaching Lublin. To fight successfully this new enemy, light (or semi-light, like husaria) cavalry became the most important element of the Polish army.