A- He reunited the Franks to fight to fight off Muslim Invasion.
He won a decisive battle against the Muslim invasion during the Battle of Tours after which they never attacked France again and stayed in Spain.
On 27 January 1945, Auschwitz concentration camp—a Nazi concentration camp where more than a million people were murdered—was liberated by the Red Army during the Vistula–Oder Offensive. Although most of the prisoners had been forced onto a death march, about 7,000 had been left behind.
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D) working with the Soviet Union to reduce the levels of nuclear weapons.