ordered the shooting of fifty Polish Jews as a reprisal near Modlin and court-martialled a platoon commander who refused to carry out his instructions. He participated in the Battle of France and was awarded the Iron Cross, First Class. Following the Battle of France, Meyer's company was reorganized into the LSSAH's reconnaissance battalion and he was promoted. Benito Mussolini's unsuccessful invasion of Greece prompted Germany to invade Yugoslavia and Greece in April 1941. During the invasion, the battalion came under fire from the Greek Army defending the Klisura Pass. After heavy fighting, Meyer's troops broke through the defensive lines; with the road now open, the German forces drove through to the Kastoria area to cut off retreating Greek and British Commonwealth forces. After the campaign, Meyer was awarded the Knight's Cross of the Iron Cross. Eastern Front, and massacres of civilians The LSSAH Division (including Meyer and his battalion) participated in Operation Barbarossa, the invasion of the Soviet Union, in June 1941 as part of Army Group South. He and his unit quickly became infamous even among the LSSAH Division for mass-murdering civilians and destroying entire villages, such as when they murdered about 20 women, children, and old men at Rowno. According to historian Jens Westemeier, Meyer was primarily responsible for the brutalization of the troops under his command. His terror tactics were regarded with approval by the Waffen-SS command. In combat against the Red Army, Meyer and his unit also achieved some military successes, while suffering the heaviest casualties among the LSSAH's battalions. He gained a reputation as an "audacious" leader during Operation Barbarossa, and was awarded the German Cross in Gold in 1942 while still with the LSSAH. In early 1943, Meyer's reconnaissance battalion participated in the Third Battle of Kharkov. He reportedly ordered the destruction of a village during the fighting around Kharkov and the murder of all its inhabitants. Different accounts of the events exist, though they share a general outline. Meyer was awarded the Knight's Cross with Oak Leaves for a successful attack on the village of Yefremovka (Jefremowka) on 20 February 1943, where his forces took no prisoners and killed about 1500 Soviet soldiers. After the war, a former SS man described an incident which took place on Meyer's orders in Jefremowka in March 1943, following its occupation. Billeted in the village, the eyewitness heard a pistol shot at 10:30 in the morning. He