The Battle of Vilnius was the first time a foreign power managed to capture a group of cultural, and historic structures on the left bank of what river?
Vilnius Castle Complex The Vilnius Castle Complex (Lithuanian: "Vilniaus pilių kompleksas" or "Vilniaus pilys" ) is a group of cultural, and historic structures on the left bank of the Neris River, near its confluence with the Vilnia River, in Vilnius, Lithuania. The buildings, which evolved between the 10th and 18th centuries, were one of Lithuania's major defensive structures.
Sinyaya River The Sinyaya (Russian: Синяя , Belarusian: Сінюха , Latvian: "Zilupe" ) is a river in Verkhnyadzvinsk Raion of Vitebsk Region of Belarus, in Zilupe, Ludza, and Cibla municipalities of Latvia, and in Sebezhsky, Krasnogorodsky, and Ostrovsky Districts of Pskov Oblast in Russia, part of the Baltic Sea basin. It is a left tributary of the Velikaya River. It is 195 km long, and the area of its basin 2040 km2 .