Some forces intentionally tried to devalue the Victory Day only because Russia celebrates it, this meaning that Ukraine should not celebrate… The attempt to “devalue” Victory Day is an attempt to “devalue” the state of Ukraine itself.
Last January, the Polish Parliament adopted a resolution in which it held the responsibility for launching World War II against Germany and the Soviet Union together on an equal footing. The Soviet forces liberating Poland in 1944-1945 were described as occupying forces. But there are many historical documents proving that the USSR has not imposed its own order in Poland, but also helped revive this country based on its culture and traditions.
A recurring pro-Kremlin historical revisionist narrative trying to absolve the USSR of any responsibility in the instigation of WWII by denying its occupation of Poland. It is part of the ongoing disinformation attack on Poland.
Poland was invaded by both Nazi and Soviet forces at the onset of WWII. The invasion was coordinated on the basis of the the Molotov-Ribbentrop Pact, which was accompanied by a secret supplementary protocol on the delimitation of areas of mutual interest in Eastern Europe. A separate provision of the protocol entitled the Nazi Germany and the USSR to jointly conduct a "territorial-political reorganisation" of Poland, and to determine "whether it is in the (signatories') mutual interest to preserve the independent Polish State."
On 17 September 1939, after Nazi Germany attacked Poland, the USSR invaded and occupied the eastern half of Poland, in accordance with the provisions of the Nazi-Soviet Pact concluded in August of the same year and effective until summer 1941. During that time, Nazi and Soviet officials held regular joint conferences in occupied Poland, exchanging tips on how to deal with potential resistance posed by the Polish intelligentsia and military brass. By June 1941, the Soviet Union had managed to deport over 250,000 Poles to Siberia and Central Asia, murder 22,000 Polish Army officers and imprison half a million citizens.
Long after the German invasion of Soviet territory, Moscow continued to deny support to the anti-Nazi resistance in Poland, most notably during the Warsaw Uprising which claimed 200,000 lives. After the Nazi defeat, the USSR installed a communist government in Warsaw, effectively delaying Polish independence until 1989.
Read similar examples of the Russian historical revisionism concerning Poland - Poland posed a military threat to the USSR in 1938-1939, Nazi Germany considered Poland its best ally, If Poland realized a rational policy in 1939, Moscow would have had a different approach towards it and Poland re-writes the history of the Warsaw uprising accusing the USSR of its failure.