Google search in English “telephone code second world war” doesn’t return anything related to our case, so let’s find this phrase in French

The first link brings the PDF document telling about the telephone code used during the WWII. Pay attention, that this code was in service since the April, 15th 1945

Let’s do the deciphering of the given message, replacing every word with the associated letter

Ursule    → M
Théophile → A
Victor    → Q
Noemie    → U
Georges   → I
Emile     → S
Kleber    → D
Bernard   → E
Robert    → L 
Marie     → O
Xavier    → R
Xavier    → R
Georges   → I
Emile     → S

So the answer is Maquis de Loris. Pay attention, that the pdf file has typo in deciphering part - Fernand and Georges associated with J, but Georges should stands for I,that wee see in encyphering part.

This answer is correct:

Find in Google text Maquis de Lorris 2024 ceremony and open the first link:

Notice, that event was held on September 15th, 2024. Now scroll down to the photo of the military orchestra:

So, the orchestra was led by Emilie Fleury

Next, find the link to the official page of the French Army Orchestra in wikipedia and open the link “View past concerts” on the events page.

We need to check the events where the orchestra took part under the command of Emilie Fleury after the performance on Septermber, 15th 2024:

This was the performance on September 28th in Bellême :

And the answer is correct:

Used tools and resources:

• Google text search
• Wikipedia
• Google Translate