Because of uncertainty in the German high command regarding Allied intentions after the D-Day landings, the 7th Army did most of the initial fighting in Normandy although it was later reinforced by the Panzer Group West. The 15th Army was kept at the Pas de Calais, expecting another landing by the Allies. By 18 June, the 7th Army had lost 97,000 men, including five generals. On 28 June, the army's commander, General Dollmann, died of a heart attack.