After previous combat experience fighting on the front, Wehrmacht soldier Hans Klapa was sent on an officer's course at the V School of Infantry Cadets in Poznań (Schule V für Fahnenjunker der Infanterie Posen) in November 1944. Following the Red Army’s offensive in January 1945, Klapa, along with 1,300 cadets of the V School and other German soldiers, was conscripted into the Festung Posen garrison (Poznań Fortress) to take part in merciless, month-long battles for the Polish city.
Alfred Kriehn fought on the Eastern Front from 1944 as an assault gun loader (Sturmgeschutz) in the elite Sturmgeschutzbrigade "Grossdeutschland". In January 1945, his unit was transferred from East Prussia to the area of Kutno (then Warthegau) in order to stop Red Army troops advancing towards Poznań. After a dramatic escape, losing his vehicle along the way, Kriehn and several of his colleagues reached Poznań, where, as a member of the assault cannon crew and the Festung Posen garrison, they again resisted the Red Army.