I know Verdun was pre 1918 but what is this patch?

[KASOH]

[CWP]

I think this patch may depict the Douaumont ossuary?

[Don D.]

I think it depicts the Victory Monument in the town.

[Mil-Archive]

I also think it's the monument and not the Ossuary. These are from a France may 1940 album, the Vent/Slit above the door matches the design :

[CWP]

You are right, I stand corrected.

[morel5000]

I think it is a scout badge? Not military related.

Best regards,
Michel

[Don D.]

More likely a souvenir.