Perhaps 23 March 1944 more likely? Freeman's Mighty Eighth War Diary gives that 19 a/c of the 1st Air Division (B-17s) bombed
Neubeckum as Target of Opportunity.
Groups of 1 AD participating were 91, 92, 303, 305, 306, 351, 379, 381, 384, 401 and 457....
A Wikipedia page about Neubeckum has 379th BG for 23.3.1944:
https://de.wikipedia.org/wiki/Neubeckum
On 21;3.1944 there (only) was a B-24 mission to N. France (V-1 base).
Regards,
Leendert