Znamensk is a rural locality in Gvardeysky District of Kaliningrad Oblast, Russia, located on the right bank of the Pregolya River at its confluence with the Lava River 50 kilometers (31 mi) east of Kaliningrad. Population figures: 4,036 (2010 Russian census); 4,302 (2002 Census); 4,570 (1989 Soviet census).

The Battle of Strėva, Strebe, or Strawe was fought on 2 February 1348 between the Teutonic Order and the pagan Grand Duchy of Lithuania on the banks of the Strėva River, a right tributary of the Neman River, near present-day Žiežmariai. Chronicler Wigand of Marburg publicized this battle as a great victory for the Knights: he claims that some 18,000 Lithuanians were killed or drowned while only 8 knights and 60 other soldiers died on the Order's side. Narimantas and Manvydas, two sons of Gediminas, Grand Duke of Lithuania, are thought to be killed in the battle.