Editing Gusev, Kaliningrad Oblast (section)

===20th century===
[[File:Гусев Gumbinnen Luftaufnahme.jpg|left|thumb|Aerial view in the early 20th century]]
During [[World War I]] the town was the site of the [[Battle of Gumbinnen]], a major battle on the [[Eastern Front (World War I)|Eastern Front]]. The battle took place nearby in the opening days of the war in August 1914, and Gumbinnen was subsequently occupied by the [[Imperial Russian Army|Russian Army]] for several months. After the war, a [[power plant]], the Ostpreußenwerk, was built in Gumbinnen and powered much of East Prussia. At the beginning of the [[Nazi Germany|Nazi era]], Gumbinnen was designated a [[Military region|military sub-region]] of the Königsberg military area. Near the end of [[World War II]], in 1944, the first of Gumbinnen's 24,000 residents began to flee from the advancing [[Red Army]], and a Soviet air attack on 16 October 1944, caused heavy damage to the inner town area. On 22 October 1944, the town was taken by Soviet forces, who engaged in numerous vengeful atrocities against the civilian population before the [[Wehrmacht]] retook the town two days later. Although the German forces [[Gumbinnen Operation|retook Gumbinnen and managed in late October to stabilize the battle line]] east of the town, it was quickly re-conquered by the Red Army during the great Soviet [[East Prussia offensive]] on 21 January 1945. During the [[Evacuation of East Prussia]], the surviving German residents fled or were [[Flight and expulsion of Germans (1944–50)|expelled]].

Following the end of the war, under border changes promulgated at the [[Potsdam Conference]] in 1945, the northern part of the former province of East Prussia became a part of the Soviet Union, including Gumbinnen. The town was renamed Gusev, in honour of a Red Army [[captain]], Sergei Ivanovich Gusev, who was killed in action near Gumbinnen in January 1945, and was posthumously given the award of [[Hero of the Soviet Union]] on 19 April 1945.{{citation needed|date=August 2013}}