Ottoman soldiers in the territory of present-day Hungary.
After weakening the Byzantine Empire and capturing Constantinople in 1453, the Ottoman Turks continued their expansion through Europe.
Suleiman I's conquests were followed by continuous territorial expansion until the Empire's peak in 1590.
Greece was occupied in 1460 and the Turks continued invading the Balkan Peninsula: Thrace, Macedonia, Bulgaria, Bosnia, Herzegovina ... until they came to Belgrade on August 28, 1521 and occupied. Belgrade surrendered and with it much of the kingdom of Hungary.
Suleiman in a portrait attributed to Titian c.1530
Turks continued to seek the European conquest and approached Vienna. There they crashed into the Holy Roman Empire.
Suleiman "The Magnificent" had ascended the throne in 1520, and demanded that the King of Hungary undergoes and pay taxes. Louis II of Hungary and most of the Hungarian nobility perished in battle.
Archduke Ferdinand of Austria and Emperor of the Holy Roman Empire territories claimed rights of his wife and failed to halt the Turkish advance due to war high costs, and surrendered definitively.
The Turks were looking to embrace Europe and almost succeeded!