I found my G. Grandpa's KIA letter and it's rekindled my interested in his time serving

Howdy!
I know next to nothing about my great grandfather, Dominik Mlasko, or his service for the Germans in WWII.
He was Yugoslavian, coming from present day Slovenia, and either enlisted or was conscripted in 1943, only to be killed in what is now Ukraine during the summer of 1944.
Having fought for the baddies, this part of my family history has always been a bit of a black sheep, it wasn't discussed in the day, and now the parts of my family that could've shed light have passed on.
What I'm left with is one thing. A letter from his commander that was sent after he was killed in action.
I've attached a scan of the letter and a text translation below.
If anyone could help me learn more about his unit or role I would appreciate it enormously!
Thank you.

____________________________________________________________________________________________________

Russia, the 20th of April 1944

Dear Mrs Mlasko!

I have to give you the painful news that your husband, the Grenadier Dominik Mlasko, was killed on 17. 4. 1944 near the village Zuranrec, south-east of Wladimir-Wolynsk

, in soldierly performance of his duty for Führer, People, and Fatherland.
On that day the company was tasked with an assault, where your husband was assigned as grenade launcher trooper. The assault was a complete success and your husband showed lots of courage and bravado. He was killed by a direct hit from a grenade and died instantly. He was buried and found his final resting place on the military cemetery in Cholopecge, near the airfield of Wladimir-Wolynsk-
.
Even though your husband was only a recent member of the company, he immediately was very comfortable with his comrades. With him the company lost a very good soldier. They will always keep him in honourable memory. I want to express, also in the name of his comrades, my deepest sympathies.
May the assurance that your husband gave his life for the greatness and the survival of our fatherland be a consolation in your heavy sorrow.

Heil Hitler
Schmidt [?]
Lieutenant and Company Leader

 

Not sure if this will help, but you can try the German Federal Archives.