The airfield at Montdidier came under heavy fighter bomber attack on 11 June followed by another attack on 12 June resulting in significant damage to the airfield. On 12 June Weissenberger filed a claim for three aerial victories. Together with his wingman, Unteroffizier (Sergeant) Alfred Tichy, he took off at 06:00 and during the course of 12 minutes shot down three P-47s.
On June 11th, the Montdidier airfield was subjected to intense fighter bomber attacks. Another assault occurred on June 12th, resulting in significant damage. On June 12th, Weissenberger claimed three aerial victories. Accompanied by his wingman, Unteroffizier (Sergeant) Alfred Tichy, they took off at 06:00 and shot down three P-47s within 12 minutes.