Complex sentence: Germans settled in Northern Hungary (in the territory of present day Slovakia) from the 12th to 15th centuries, mostly after the Mongol invasion of 1241, though there were probably some isolated settlers in the area of Pressburg earlier.
Split into simpler sentences: Germans settled in the northern territory of the Kingdom of Hungary (territory of present day Slovakia) from the 12th to 15th centuries, mostly after the Mongol invasion of 1241. There were probably some isolated settlers in the area of Pressburg earlier.