[3] Grigory Sergeevich Grintser was born on 29 October 1886 in Novomoskovsk,[4] to the family of the district zemstvo veterinarian Sergei Grigorievich Gorchakov [ru]; they were of the Russian Orthodox faith.

At first, his academic performance and behavior dropped, but later, having shown diligence, he completed the full course of the real school, including its additional 7th grade, which allowed admission to higher educational institutions.

Grigory chose military service and submitted documents to the St. Petersburg Infantry Cadet School in 1908 where he was refused without explanation.

The junior officer's service regiment was part of the 2nd Brigade of the 22nd Infantry Division and located in the Arakcheyev barracks of the Gruzino estate.

On 14 November 1914, in a battle near the Bielawa settlement of the Lodz Voivodeship, he lieutenant was wounded twice,[7] and evacuated to the officer's hospital of the Page Corps.

For distinction in the battle near the village of Piotrovice, he was awarded the Order of St. Anna, 4th Class, with the inscription "for bravery" (VP 28.06.1915).

For distinction in the battle near the village of Valevice, he was awarded the Order of St. Anna, 3rd Class, with swords and a bow (VP 08.09.1915).

[14] He successively held the positions of regimental adjutant, chief officer for assignments of the headquarters of the 67th Infantry Division (as of October 1916).

In August 1917, as one of the three best officers of the corps, he attended the General Staff Academy for accelerated training courses of the 3rd stage.

Communication with the headquarters of the Southern Front was lost, and under threat of encirclement, parts of the military group began to retreat to the Novy Oskol area.

During these events (September 16), the headquarters of the Southern Front received a telegram from Lenin, in which he shared his fears of possible betrayal on the part of Selivachyov and his division commanders.

[18] On 17 September, Selivachyov suddenly died of typhus, and the very next night, Nashtarm A. S. Nechvolodov and his wife defected from the 8th Army headquarters to the Whites.

Gorchakov was finally granted leave to improve his health, but by the of end December 1919 returned to staff work, taking up the post of chief of the operational department of the 8th Army.

The military specialist's further combat path was associated with the Rostov-Novocherkassk, Don-Manych, and North Caucasian operations, ending with the complete defeat of the Whites in Novorossiysk.

On 19 July 1920, during a deep outflanking maneuver, Gai's 3rd Cavalry Corps, also part of the 4th Army, occupied the fortress city of Grodno.

The 4th Army Commander, E. N. Sergeev, was in Vilnius and was conducting diplomatic negotiations with the Lithuanian authorities at the time to determine the latter's further actions.

By 22 July, there was still no communication with G. D. Gaia,[27] and the soldiers of the cavalry corps left without support, were engaged in the heaviest street battles in dismounted formation.

Concerned about the prolonged lack of communication with the cavalry corps, the 4th Army Commander sent his trusted and authoritative person to Grodno.

[31][32] Further events developed tragically: from 14 to 16 August 1920, Polish troops launched a series of counterattacks against the Red Army of the Western Front.

Shuvaev-Gorchakov's 4th Army was in a challenging situation; its units were advanced far to the west, occupying a vast front of the Polish Corridor.

By 25 August, the defeated units of the 4th Army, after continuous battles in encirclement, crossed the border of East Prussia where they were interned.

Only small remnants of six regiments from the 12th Infantry Division, alongside the headquarters of the 4th Army were able to emerge from encirclement into operational space.

[40] This appointment was made possible thanks to the assistance of his former army comrade, Grigory Sokolnikov, who then held the post of Deputy People's Commissar of Finance of the RSFSR.

By the Decree of the Central Executive Committee of the USSR on 7 September 1937, he was deprived of the Order of the Red Banner of the RSFSR.

From 4 September 1942, it took part in the Battle of Stalingrad, where its active operations held back significant enemy forces in the Sukhaya Mechetka ravine area for 40 days.

According to data from the "Brief Combat History of the 120th Rifle Division" compiled by Captain Gorchakov, the Germans suffered over 6,000 casualties.

After moving to the Kachalinskoye - Krivoe Lake area, the Division took part in the subsequent dissection of Field Marshal Paulus's encircled group.

He had a long combat history, participating in the Znamenskaya, Kirovograd, Belgorod-Kharkov, Uman-Botoşani, Iasi-Kishinev, Budapest, Balaton, and Vienna military operations.

He had an older sister, Natalya Sergeevna Popova (1885–1975), who was a mathematician, and a younger brother, Alexander Sergeevich Gorchakov (Grintzer) (1888–1967), who served as the head of the chancery of the Astrakhan governor in 1916.

[46] Additionally, his cousin, Grigory Mikhailovich Grintser (Grigoriev), held the rank of lieutenant colonel in the Imperial Russian Army, serving as quartermaster of the 50th Infantry Division in 1917.