The Tallinn Offensive (Russian: Таллинская наступательная операция) was a strategic offensive by the Red Army's 2nd Shock and 8th Armies and the Baltic Fleet against the German Army Detachment "Narwa" and pro-independence Estonian units in mainland Estonia on the Eastern Front of World War II on 17–26 September 1944. Its German counterpart was the abandonment of the Estonian territory in a retreat codenamed Operation "Aster" (German: Unternehmen "Aster").