The Moravia–Ostrava offensive operation (Russian: Моравско-Остравская наступательная операция) was an offensive by the Red Army during World War II that lasted from March 10 to May 6, 1945, and was the Soviet conquest of present-day Eastern Czech Republic (Moravia also part of Polish and Czech Silesia).

In the spring of 1945, the frontline on the southwestern border of Lesser Poland ran from Wieliczka via Jaworzno and Gliwice to Międzylesie.

On the western part of the High Tatras, a frontal arch had formed, covering the northeastern and southeastern borders of Slovakia.

On March 10, the offensive of the 4th Ukrainian Front began with the 38th Army (General Kirill Moskalenko) from Pszczyna and Černá Voda area.

The Stavka then changed the further operational plan to the southwest towards Olomouc, because the possibility was offered to cut off the 1st Panzer Army.

The aim of the Soviet offensive was to cut off its connection with the German 17th Army (General of the Infantry Friedrich Schulz).

Field Marshal Ferdinand Schörner moved five German divisions to reinforce the threatened positions of the 1st Panzer Army in the Opava area.

The 17th Guard Rifle Corps (Lieutenant General Nikifor Medvedev) of the Soviet 18th Army, which is still standing in the east, was finally able to force the German LXXII Army Corps to retreat from the northern Váh section and occupy Žilina on 30 April.