Led by the Soviet Union’s Red Army, the Moravia–Ostrava offensive was the largest combat operation on the territory of modern-day Czechia. It lasted almost two months, from March 10th to May 6h 1945, and approximately 400,000 soldiers were deployed. In our anniversary series '80 years ago: How did WWII end in the Czech lands?', we look at the events and the significance of this brutal chapter of Czech history, with comments from expert historian Jiří Neminář.