Dr. Marek Chodakiewicz--who currently holds the Kościuszko Chair in Polish Studies--wrote many monographs on the German and Soviet occupations of Poland and the greater Intermarium region of Central and Eastern Europe. These studies inevitably dealt with genocides committed by both totalitarian regimes.
As an expert in the field, Dr. Chodakiewicz was mentioned in a recent book on Soviet mass murder in the Vilnius/Wilno region (before the Second World War a part of Poland, now the capital of current-day Lithuania): Rokas Tracevskis, The Manor of Horror: The Soviet-Era Mass Grave in Vilnius (Vilnius: Genocide and Resistance Research Centre of Lithuania, 2013). His name appeared in the context of the Ejszyszki attack of 19-20 October 1944.
In his work on the subject, Dr. Chodakiewicz clarified that the Ejszyszki incident--which was falsely and inaccurately misrepresented by Western historiography as a pogrom perpetrated by Polish "Fascists"--was actually and simply an operation by the Polish anti-Nazi, anti-Soviet resistance against the Soviet NKVD and its collaborators.
The case study of Ejszyszki offers a universally applicable insight into inter-ethnic relations during times of war and conflict.