The Gumbinnen Operation, also known as the Goldap Operation, was a Soviet offensive on the Eastern Front late in 1944, in which forces of the 3rd Belorussian Front attempted to penetrate the borders of East Prussia.

Gusev is a town and the administrative center of Gusevsky District of Kaliningrad Oblast, Russia, located at the confluence of the Pissa and Krasnaya Rivers, near the border with Poland and Lithuania, east of Chernyakhovsk. Population: 28,177 (2021 Census); 28,260 (2010 Russian census); 28,467 (2002 Census); 27,031 (1989 Soviet census).