Okoliczności zerwania przez Związek Sowiecki stosunków dyplomatycznych z Polską w kwietniu 1943 r.

The article focuses on the circumstances of the USSR’s breaking off diplomatic relations with Poland in April 1943. The main research problem is the sequence of events in the Polish-Soviet relations in the period from July 1941, i.e. from the signing of the Sikorski-Majski pact, to April 1943, which consequently led to their breaking. The theoretical basis is constituted by the source documents and the basic literature on the subject. The primary research method was a critical analysis of sources and literature. On the basis of the conducted research, the author argues that the matter of the graves of the Polish officers murdered in Smolensk was only a pretext to make a decision to break off the diplomatic relations with the government of General Władysław Sikorski by the USSR and to start cooperation with Polish communists gathered in the Union of Polish Patriots.