On 6 April 1941, Nazi Germany invaded Greece under Operation Marita, but the brutal occupation that followed would leave scars far deeper than the battle for territory. Three years later, on 5 April 1944, soldiers of the 4th SS Polizei Panzergrenadier Division, aided by Bulgarian collaborators, descended on the Greek village of Kleisoura. In less than two hours, they murdered 280 civilians—mostly women, children, and the elderly—in one of the most horrific massacres of the German occupation. Pregnant women were mutilated, children bayoneted, homes burned, and families destroyed. This is the forgotten story of ruthless Nazi reprisal, resistance, and a village that became a symbol of Greek suffering during the Second World War.