Awarded for his actions during the pursuit battles of the 14. Panzer-Division towards the Lower Don in mid-1942. He particularly distinguished himself on the 23.07.1942, west of Nowotscherkask. A week later, on the 30.07.1942, his Abteilung destroyed a Soviet tank unit near Kutejnikowskaja.
Several sources state the awarding of the DKiG with the II. / Panzer-Regiment 36. Research suggests that Langkeit was appointed Kommandeur I. / Panzer-Regiment 36 on 1st July 1942.
At the end of October 1943 Langkeit and his armoured Kampfgruppe contributed significantly to recapturing the previously lost Ingulez sector, reaching the line Nowo Iwanowka - Krassny. Later on the Kampfgruppe launched a new advance on the 20.11.1943 and in a hard tank battle destroyed 22 enemy tanks.
On the 26.11.1943 the same Kampfgruppe attacked from Protopopowka towards the north, blocking the three important roads from Kossowka towards the west and destroying 21 enemy tanks. In this time an enemy infantry attack launched in strength of about two regiments was similarly crushed.
For his accomplishments during this time Langkeit would be decorated with the Oakleaves.