On June 22, 1941, Adolf Hitler sent four million troops to invade the USSR as part of Operation Barbarossa; the ensuing struggle would be the bloodiest conflict in history. Now, this date is observed as the Day of Memory and Grief in Russia. 

We have prepared a few words on this topic #Day_of_Grief_and_Remembrance

? War [wɔː]- война
? Grief [griːf]- скорбь
? Troops [truːps]- войска, солдаты
? Struggle ['strʌgl]- борьба
? bloody['blʌdɪ]- окровавленный; кровавый