What country lost more soldiers and has the most missing?

The Soviet Union suffered the highest number of military casualties during World War II, with estimates of around 8.7 million soldiers killed and millions more missing. The Eastern Front, where the Soviet forces engaged in brutal warfare against Nazi Germany, accounted for a significant portion of these losses. Many soldiers were unaccounted for due to the chaotic nature of the conflict and the vastness of the front lines. This immense toll reflects the scale and devastation of the war in that region.