Mezue ahịrịokwu na-esonụ: Na Mee 1941 Panzer Group 1 so n'òtù ndị agha Gerd von Rundstedt Army Group South na mbido Operation Barbarossa. Na mmalite nke Operation Barbarossa na June 1941, Panzer Group 1 gụnyere III, XIV na XLVIII Army Corps (motorized) nwere ngalaba panzer ise na ngalaba anọ nwere moto (abụọ n'ime ha SS) nwere 799 tankị. Panzer Group 1 jere ozi na mpaghara ndịda nke Eastern Front megide Red Army ma tinye aka na
Agha nke Brody nke gụnyere ihe ruru tankị Red Army 3,000. Ndị otu nke Group mechiri gburugburu ndị agha Soviet n'akụkụ Uman na nso Kiev. Mgbe ọdịda nke Kiev Panzer Group 1 abawanyewo ka ọ bụrụ 1st Panzer Army (na Ọktoba 6, 1941) na Kleist ka na-achịkwa. Ndị agha jidere Rostov, mana a manyere ha ịlaghachi azụ ụbọchị asatọ ka e mesịrị.