Operation Kutuzov was the first of the two counteroffensives launched by the Red Army as part of the Kursk Strategic Offensive Operation. It commenced on 12 July 1943, in the Central Russian Upland, against Army Group Center of the German Heer. The operation was named after General Mikhail Kutuzov, the Russian general credited with saving Russia from Napoleon during the French invasion of Russia in 1812. Operation Kutuzov was one of two large-scale Soviet operations launched as counteroffensives against Operation Citadel. The Operation began on 12 July and ended on 18 August 1943 with the capture of Orel and collapse of the Orel bulge.

As the end of the rasputitsa or rainy season approached, the Soviet command considered their next steps. Stalin strongly desired to seize the initiative and attack the German forces but was convinced by his senior commanders to take an initial defensive posture and allow the Germans to weaken themselves in attacking prepared positions. After this the Soviet forces would go over onto the offensive. Operation Kutuzov was the offensive plan for the Soviet forces before Moscow facing the German forces of Army Group Center. It was carried out by three Soviet Fronts or army groups: the Western Front, the Bryansk Front and the Central Front. The offensive was directed north of the Kursk area against the German 2nd Panzer Army, with the intention of cutting behind and trapping the German 9th Army then conducting offensive operations against the Kursk salient.

The Germans had spread their forces thin all across the front in an effort to provide as much men and material as possible for Operation Citadel. Holding the front before the Soviet offensive were the 2nd Panzer Army and elements of the 9th Army. The region had been held by German forces for nearly two years and despite Hitler's admonition not to build defensive works behind the front, some preparations had been made. A defensive line had been started that was 5–7 kilometres (3.1–4.3 mi) in depth, consisting of minefields, interconnected trench works, and strong points. Wherever possible, the Germans took advantage of terrain features such as streams, ravines and gullies but the positions were thinly held.

The Soviet high command planned two offensives as part of a large general offensive throughout the eastern front. Operation Kutuzov was the northern offensive (the other being the Donbas offensive south of Kursk), with its objective being to collapse the Orel salient, cut behind the 9th Army engaged in offensive operations at Kursk, encircle and annihilate it. In doing so they hoped to cause a general collapse of the German forces in the Soviet Union. The attack was to begin once the German panzer units engaged in Operation Citadel were locked into combat and weakened by their offensive at Kursk. The initial attack was to be made simultaneously on the northern and eastern faces of the Orel salient, with the Central Front along the southern face of the salient joining in as well, once the German offensive had been stopped.

German intelligence had revealed the Soviet forces massing opposite the 2nd Panzer Army and these had caused great concern to Kluge and Model. The Soviet armies earmarked for the operation had amassed a force of 1,286,000 men and 2,400 tanks. These were supported by 26,400 guns and 3,000 aircraft.

The Soviet offensive was aided by partisan attacks behind the German lines. Approximately 100,000 Soviet partisans (according to Soviet reports) were working to disrupt German efforts to supply and reinforce their forces. German movements of ammunition and reinforcements were hampered throughout the operation by attacks on German communications and supply routes, especially railway lines. The partisans operated under the guidance of the Red Army.

On 12 July, a heavy artillery barrage marked the launching of the offensive. The armies of the Bryansk Front and the Western Front attacked along the north and north-east flanks of the 2nd Panzer Army. The Western Front assault was led by the 11th Guards Army under Lieutenant General Hovhannes Bagramyan, supported by the 1st and 5th Tank Corps. The Soviets attacked with overwhelming numbers. Along one 16-kilometre (9.9 mi) attack sector near Ulianovo, six Soviet rifle divisions attacked two German infantry regiments. At 5–7 kilometres (3.1–4.3 mi) in depth, the German defensive lines were deeper than the Soviets expected. The Soviet spearheads sustained heavy casualties but pushed through and in some areas achieved significant penetration. The defenders were overwhelmed by the afternoon of the first day, with the 11th Guards Army advancing some 23 kilometres (14 mi). The German 5th Panzer Division attempted to fill the breach but they were met by the Soviet supporting armour and were forced back.

The initial attacks on the eastern face by the Bryansk Front were less successful. The 61st, 3rd, and 63rd armies advanced 8, 14 and 15 kilometres (5.0, 8.7 and 9.3 mi) respectively. The following day the German LIII Army Corps counter-attacked and brought the Bryansk Front to a halt. The open terrain favored the longer ranged guns of the Germans. Kluge and Model had anticipated the Soviet attack and were quick to transfer units from the Kursk area to reinforce the defenders. Their timely arrival helped check the Soviet advance.