Complex sentence: About 2,000 donors contributed 20 tonnes of blood for this purpose; also, 18,707 citizens were mobilized into the Army; of them 4,566 were killed and 17 were awarded the Hero of the Soviet Union award (8 posthumously).
Split into simpler sentences: About 2,000 donors contributed 20 tonnes of blood for this purpose. Also, 18,707 citizens were mobilized into the Army; of them 4,566 were killed and 17 were awarded the Hero of the Soviet Union award (8 posthumously).