Short answers, pulled from the story.
The Jassy-Kishinev offensive was a Soviet assault against Axis forces in Eastern Romania that ran from the 20th to the 29th of August 1944 during World War II. The 2nd and 3rd Ukrainian Fronts attacked Army Group South Ukraine, which consisted of combined German and Romanian formations, in an operation to reoccupy Bessarabia and destroy Axis forces in the region.
The German-Romanian front line collapsed within two days of the offensive's start on the 20th of August 1944. By the 23rd of August, the German 6th Army had been encircled to a depth of 100 km and was no longer able to receive organized resupply. The 13th Panzer Division ceased to exist as a tactical unit on the third day.
Soviet reports show no evidence of collaboration before the 24th of August 1944, and the Soviet rates of advance are consistent with ineffective defense rather than mass surrender. Romanian formations lacked modern anti-tank and artillery weapons to resist Soviet forces effectively. The only Romanian formation to maintain cohesion was the 1st Armored Division, which had both the mobility and anti-tank weapons the horse-drawn infantry divisions lacked.
On the 23rd of August 1944, King Michael of Romania led a coup that deposed Antonescu and withdrew Romania from the Axis. By that date, Soviet forces had already moved deep inside Romania and most German and Romanian forces were destroyed or cut off. Open fighting between German and Romanian forces followed, with all German resistance in Romania cleared by the 31st of August.
Over 115,000 German prisoners were taken in the encirclement, losses the source compares to the defeat at Stalingrad. Romania's defection cut off a vital source of oil for Germany, producing serious fuel shortages in the Wehrmacht by the end of 1944 and prompting Hitler's first admission that the war was lost. Soviet forces also used the breakthrough to advance into Yugoslavia, forcing German Army Groups E and F to withdraw from Greece, Albania, and Yugoslavia.
In Moldova and Transnistria, the 24th of August is a public holiday known as Liberation Day. A liberation monument at the Academy of Sciences of Moldova, opened on the 23rd of August 1969, has been renovated in 1975, 2014, and 2019. The Eternity Memorial Complex in Chișinău, opened in 2006, serves as the Soviet war memorial in Moldova, and the Capul de pod Șerpeni Memorial Complex opened in 2004.