Commemorations marking the 80th anniversary of the start of World War II in Poland this weekend come as the war has become a messy battleground of memory.
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In Poland and across Eastern Europe, many feel that their people's suffering has never been adequately recognised, or that they have been unfairly tarnished for their behaviour at that time - grievances politicians have been exploiting in a new era of nationalism.
For Americans and others, World War II might seem a black-and-white story of good defeating evil, with the Allies fighting far from home to defeat Adolf Hitler's genocidal regime and open a new era of peace and liberty.
But from the Baltics and Poland to Hungary and Russia, where fighting, deportations and mass executions happened, there are many shades of grey: heroic resistance and martyrdom but also collaboration - and a liberation by Soviet forces that spelled the start of decades of occupation and oppression for those behind the Iron Curtain.
That leaves a lot of room for differing ways to remember the war.
Sunday marks exactly 80 years since Nazi Germany invaded Poland, on September 1, 1939, the attack that triggered a nearly six-year world conflict that left more than 70 million people dead before Germany and Japan surrendered in 1945.
US President Donald Trump had been expected to attend but cancelled to stay home and deal with a hurricane barreling toward Florida, tapping Vice President Mike Pence to replace him. Others leaders who are attending include German Chancellor Angela Merkel and Ukrainian President Volodymyr Zelenskiy.
"The anniversary celebrations are to be a warning to the world - about the necessity of peace, about the sovereignty of states, about not negotiating at the expense of others," said Krzysztof Szczerski, top aide to Polish President Andrzej Duda.
Notably absent will be Russian President Vladimir Putin, who attended 70th anniversary commemorations in Poland in 2009 amid an attempted Russia-Western thaw at that time. He was not invited this time because of his annexation of Ukraine's Crimean Peninsula, and is all the more unwelcome due to a Russian rehabilitation in recent years of the Stalinist era.
In Moscow, some saw Trump's cancellation as part of a wider problem with the ceremonies.
"Trump found a reason not to come. The absence of the head of the USA for the anniversary is a failure for Warsaw," said Alexei Pushkov, a member of the upper house of parliament whose views on foreign affairs generally reflect Kremlin thinking. "The absence of the head of Russia is a gross miscalculation."
Two weeks after Germany invaded Poland in 1939, the Soviet Union invaded Poland from the east, with Adolf Hitler and Josef Stalin carving up Poland and the Baltic states based on a secret protocol in the Molotov-Ribbentrop pact signed Aug. 23, 1939.
In 2009, Putin said that all pacts made with the Nazis "were unacceptable from the moral point of view." But since then, Russia has returned to an earlier insistence that the USSR shares no responsibility for starting the war. Russian schoolchildren are taught that what Russia calls the "Great Patriot War" began not in 1939, but in 1941, when Nazi Germany attacked the Soviet Union.
This week the Russian government put out a video that seeks to rehabilitate the pact, arguing that the USSR was forced into it by the failure of the West to stand up to Hitler's aggression and even blaming Poland for the war.
"Today there are, unfortunately, many trying to falsify history," Duda said recently. "They suggest that, in fact, World War II began in 1941. No - the war began with the Nazi-Soviet invasion of Poland in September 1939 based on the arrangements of the Molotov-Ribbentrop Pact."
By war's end, nearly 6 million Polish citizens had been killed, 3 million of them Polish Jews who made up half of all the European Jews killed in the Holocaust.
Unlike other countries occupied by Germany at the time, Poland never had a collaborationist government. The prewar Polish government and military fled into exile, except for an underground resistance army that fought the Nazis inside the country.
Duda and the other nationalist leaders in charge today often stress that heroism - but they too are accused of twisting war memories for political gain, with a tendency to focus only on the good and play down uncomfortable chapters of that era.
Australian Associated Press