Jassy–Kishinev Offensive
The Jassy–Kishinev Operation, named after the two major cities, Iași and Chișinău, in the staging area, was a Soviet offensive against Axis forces, which took place in Eastern Romania from 20 to 29 August 1944. The 2nd and 3rd Ukrainian Fronts of the Red Army engaged Army Group South Ukraine, which consisted of combined German and Romanian formations, in an operation to reclaim the Moldavian SSR and destroy the Axis forces in the region, opening a way into Romania and the Balkans.
The offensive resulted in the encirclement and destruction of defending German forces, allowing the Soviet Army to resume its strategic advance further into Eastern Europe. It also forced Romania to switch allegiance from the Axis powers to the Allies.
Background
The Red Army had made an unsuccessful attack in the same sector, known as the First Jassy–Kishinev Offensive from 8 April to 6 June 1944. In 1944, the Wehrmacht was pressed back along its entire front line in the East. By May 1944, the South Ukraine Army Group (Heeresgruppe Südukraine) was pushed back towards the prewar Romanian frontier, and managed to establish a line on the Dniester river, which was however breached in two places by Red Army bridgeheads. After June, calm returned to the sector, allowing the rebuilding of the German formations.