[2] After the occupation of Lwów by the Soviet army in 1939 and the reorganization of the university by the NKVD, Allerhand was fired, but after several months allowed to teach at the Law Faculty again.

In August, his son Joachim and daughter-in-law Zina (Zinajda) along with their only child Leszek made a successful escape into the aryan side of the city.

On 10 August 1941, Allerhand and his wife Salome (Salomea née Weintraub) were transported from the ghetto to Janowska concentration camp on the outskirts of Lwów.

[4] Their deaths are not documented, but after the war, Karol Koranyi made a reference to an eyewitness who survived the Camp and saw them being murdered in the same month by the Ukrainische Hilfspolizei.

Decades later and only after the collapse of the Soviet empire - known for falsifying the wartime history of the city - his grandson Leszek published a 2003 book based on the memoirs of his grandfather written in 1941–1942,[7] started by Allerhand soon after the German attack of Lwów and concluded in February 1942.

It describes the 1941 pogroms perpetrated by Germans with the aide of local Ukrainians,[5] but also, it includes a mention of his conversation with a former agitator installed at UoL by the Soviets, blaming the Poles for it.

The original manuscript survived in the Archives of the Jewish Historical Institute in Warsaw (Teka Lwowska), unknown to anybody before the 1962 death of prof. Stefan Stasiak from UoL who kept it safe among his own papers.