The regiment was tragically affected by the Katyn massacre during World War II, with many of its soldiers falling victim to Soviet executions.

It was created from volunteer units fighting on the front lines, drawn from Pleszew and Środa Wielkopolska, as well as the reserve battalion of the 12th Rifle Regiment.

[3] On 26 April, the Greater Poland regiments approached Berdychiv and attacked the railway station, which was defended by units of the 44th Rifle Division.

Near Wola Karczewska, Lieutenant Lorek's battalion attacked a Soviet cavalry unit, scattering them and inflicting heavy losses.

Surprised by the two-pronged attack, the Soviets offered weak resistance, and after a bayonet charge, the Poles captured the manor and the nearby battery.

As the enemy began surrendering en masse, the 4th Company, which had been securing the assault, completed the encirclement, allowing only a few Soviet soldiers to escape from the trap.

[19] In response to the growing political and military threat from Nazi Germany, on 23 March 1939, an alarm mobilization was ordered in designated units of the IX and partially of the IV Corps Districts.

[23] On the morning of 28 August, it was positioned in waiting areas as follows:[24] The regiment continued fortification work, training activities, and finishing organizational tasks.

[25] At 7:15 PM, the 62nd Infantry Regiment, minus its battalion, received orders to occupy the section from 108.9 Hill through Tryszczyn to the southern edge of the forest near Łącznica.

[26] At 1:00 PM, the German 121st Infantry Regiment launched an attack from Wtelno, attempting to bypass Tryszczyn, cross the Brda river near Łącznica and Bożenkowo.

[30] The reconnaissance detachment, in the Bilica–Nowa Rupnica area, encountered German forces after emerging from the forest and came under heavy machine gun fire.

[30] At 3:00 PM, effective shelling by nine howitzer batteries from the 15th Light Artillery Regiment in the Piecki area delayed the advance of the German forward guard.

[30] For the second time, during the night of 6–7 September, on the orders of the Pomeranian Army's commander, General Władysław Bortnowski, the 15th Infantry Division withdrew from the enemy and moved along the left bank of the Vistula river towards Sochaczew and Warsaw.

[31] The division's route passed through Dąbrowa Wielka, Gniewkowiec, Broniewo, Rojewo, Płonkowo, reaching the area near Gniewkowo by the afternoon of 7 September.

Due to significant congestion on the roads, the division did not reach the area of the Parchany Canal and Bachorza until the morning of 8 September.

Supported by the 82nd Machine Gun Company and the fire of the 5th Battery of the 15th Field Artillery Regiment, the 86th Battalion halted the German advance and pushed them back to their starting positions.

[35] At 10:00 PM, the Detached Unit began its march via Kłóbka, Pomorzany Manor, and Sokołów towards the forests to the north and south of the village of Lubieniek.

[37] Due to a change in the offensive strategy of the combined forces of the Poznań and Pomeranian armies, the 15th Infantry Division received orders to regroup to the area of Budy Stare.

During the march, the battalion received orders to take a defensive position on the western bank of the river, between Biała Góra and Hill 83.4, thus closing the crossing at Brochów.

That evening, the 15th Infantry Division received orders from General Tadeusz Kutrzeba to capture the area around Mościska and Laski.

Their route passed through Blizne, Chrzanów Nowy, Ożarów, Błonie, Sochaczew, and Łowicz, leading to prisoner-of-war transit camps.

From 30 August to 6 September, organizational efforts commenced under Lieutenant Colonel Józef Wyzina, the depot commander, who had also arrived during this period.

[45] The surplus battalion of 62nd Infantry Regiment, accompanied by Lieutenant Colonel Boehm, marched out of Bydgoszcz during the night of 2–3 September, passing through Solec Kujawski to Toruń.

From there, the battalion advanced beyond Włocławek and briefly traveled 50 kilometers by train before continuing on foot due to destroyed rail tracks.

While crossing the bridge over the Bzura river in Sochaczew, it came under German machine gun and artillery fire, suffering partial disbandment.

[46] Following the Soviet invasion, the remnants of the 15th Infantry Division under Lieutenant Colonel Boehm withdrew from the Volodymyr-Volynskyi region to the Lublin area.

The final group of surplus soldiers from 62nd Infantry Regiment, led by Lieutenant Colonel Stanisław Boehm, was captured by German forces on 30 September in the village of Szczuczki near Lublin.

In the corners of the banner, in smaller wreaths, were placed shields with the following images:[53] On the arms of the cross were inscriptions commemorating locations related to the regiment's history:[53] A white and red ribbon with the inscription commemorating the banner's benefactors was attached to the standard, reading: "City of Bydgoszcz to its children, the vicinity of Bydgoszcz to its children".

[13] The badge, measuring 49x49 mm, is shaped like a Maltese cross covered in white enamel, symbolizing virtue, bravery, and sacrifice made by soldiers for the homeland.

[13] The manufacturer of the officer's badge, which was donated to the Polish Army Museum by the Ministry of Military Affairs in 1925, was the goldsmith and engraver Paul Kinder from Bydgoszcz.