Long War: Austria captures Transylvania in the Battle of Goroszló.

The Long Turkish War, Long War, or Thirteen Years' War was an indecisive land war between the Holy Roman Empire and the Ottoman Empire, primarily over the principalities of Wallachia, Transylvania, and Moldavia. It was waged from 1593 to 1606, but in Europe, it is sometimes called the Fifteen Years' War, reckoning from the 1591–1592 Turkish campaign that captured Bihać in the Kingdom of Croatia. In Turkey, it is called the Ottoman–Austrian War of 1593–1606.

The Habsburg monarchy, also known as Habsburg Empire, or Habsburg Realm, was the collection of empires, kingdoms, duchies, counties and other polities that were ruled by the House of Habsburg. From the 18th century it is also referred to as the Austrian monarchy, the Austrian Empire or the Danubian monarchy.

Transylvania is a historical and cultural region in Central Europe, encompassing central Romania. To the east and south its natural border are the Carpathian Mountains and to the west the Apuseni Mountains. Broader definitions of Transylvania also include the western and northwestern Romanian regions of Crișana and Maramureș, and occasionally Banat. Historical Transylvania also includes small parts of neighbouring Western Moldavia and even a small part of south-western neighbouring Bukovina to its north east.

The Battle of Guruslău or Battle of Goroszló was fought on 3 August 1601, between the troops of the Habsburg monarchy led by Giorgio Basta, the Cossacks and Wallachia led by Michael the Brave on one side, and the Transylvanian troops led by Sigismund Báthory on the other side. It was part of a series of military encounters between the Ottoman Empire and opposing European states during 1591–1606.