South Holland

The aircraft left RAF Leeming in the evening of June 12 on a bombing mission to Bochum, Germany. While overflying The Netherlands by night, the aircraft was shot down by the pilot of a German fighter and crashed in flames in a field. Four crew were killed while three others were injured.
Crew (427th Squadron):
P/O Al M. Fellner, pilot,
Sgt J. Imms, †
P/O G. Dalton, †
P/O W. Thurston,
P/O B. Tedford, †
Sgt A. Dixon, †
P/O G. Huston.
Source & photos: http://www.626-squadron.co.uk/willem23.htm

While flying west of Utrecht, the aircraft collided with another USAAF B-26B Marauder registered 41-17991 and carrying a crew of six as well. Both aircraft went out of control and crashed in a field located in Bodegraven, west of Utrecht. Two crew survived in each aircraft while all eight other occupants were killed.
Crew (452nd BS):
Cpt William Converse, †
2nd Lt Berton H. Ramsey, †
Lt Arthur E. Garni, †
T/Sgt James D. Thompson,
Sgt Kenneth H. VonLindern, †
Sgt Frank Lamonica.

The aircraft was hit by debris from the mid-air collision between both Marauder 41-17991 and 41-18080. The captain attempted an emergency landing in a field and the aircraft came to rest near Bodegraven. While the aircraft was damaged beyond repair, all six crew members were taken PoW.
Crew (452nd BS):
Lt David V. Wurst,
2nd Lt Robert L. Starr,
2nd Lt A. E. Speer,
Cpl George Heski,
S/Sgt Robert J. Dempsey,
Sgt Reginald Foster.

While flying west of Utrecht, the aircraft collided with another USAAF B-26B Marauder registered 41-18080 and carrying a crew of six as well. Both aircraft went out of control and crashed in a field located in Bodegraven, west of Utrecht. Two crew survived in each aircraft while all eight other occupants were killed.
Crew (452nd BS):
Lt Richard O. Wolfe, †
Lt Jack E. Vandergrift, †
2nd Lt John H. Burns, †
Sgt Kleber L. Jones,
Sgt Chester J. Walas,
Sgt John L. Nash. †

While approaching Rotterdam from the west, on a bombing mission, the aircraft was shot down by the German Flak and crashed in the Maas River located in Maassluis. Two crew members were killed while four others were taken PoW.
Crew (450th BS):
Lt Vincent S. Garrambone,
2nd Lt Leonard S. Lang,
2nd Lt James R. Hoel,
Sgt John L. Stefanowicz, †
Sgt John Logan,
Sgt Melvin O. Cage. †

While approaching Rotterdam from the west, the aircraft was shot down by the German Flak and crashed in a field located in Rozenburg. Three crew members were killed while three others were taken PoW.
Crew (322nd BG/452nd BS):
Lt Col Robert W. Stillman,
Lt Ellis J. Resweber, †
2nd Lt William R. Betz, †
S/Sgt Morgan S. Freeman,
T/Sgt Clyde D. Willis,
S/Sgt Edward K. Hagetter. †

The airplane departed RAF Methwold at 1800LT on an operation to the docks at Rotterdam. While approaching the Dutch coast, it was shot down by the German Flak and crashed into the North Sea off The Hague. All four crew members were killed.
Crew (487th Squadron):
F/Sgt Robert Steedman, pilot,
F/Sgt Stafford Thomas O'Connor,
F/Sgt John Andrew Williamson,
F/Sgt Sylvan Ellwood Weaver.

The airplane departed RAF Methwold at 1800LT on an operation to the docks at Rotterdam. While approaching the Dutch coast, it was shot down by the German Flak and crashed into the North Sea some 60 km off The Hague. All four crew members were killed.
Crew (464th Squadron):
Sgt Albert Leonard Lush, pilot,
W/O William Wallace Collens, navigator,
F/Sgt Eric Walter Cole, wireless operator,
F/Sgt Duduley Francis Fulford, air gunner.

The airplane departed RAF Leeming at 1956LT on an operation to Essen. In the late evening, while returning to base and cruising over the Netherlands at an altitude of 13,000 feet, it was shot down by a German fighter and crashed in Rotterdam. The bomb aimer was killed and all seven other crew members became PoW.
Crew:
P/O James Lago, pilot,
W/O Keith Oliver Perry, pilot,
Sgt Welland Wilfred Phipps, flight engineer,
F/O John Henry Colwell, navigator,
W/O Walter Stanley Beatty, bomb aimer, †
F/O William Henry Hoddinott, wireless operator,
F/Sgt Henry Champion Waugh, air gunner,
Sgt Amand Burns Granbois, air gunner.

The airplane departed RAF Linton-on-Ouse at 1945LT on an operation to Essen. Following a successful mission, the crew was returning to base when, passing over the Netherlands, the airplane was shot down by a German fighter and crashed into the sea 3 km southwest of The Hague. The pilot was killed and six other crew members became PoW.
crew:
F/O Thomas Noble Forster, pilot, †
Sgt Walter Frederic Hodgson, flight engineer,
Sgt George Edward Sendall, navigator,
P/O James Hilton Jamieson, bomb aimer,
Sgt Eric Afred Drury, wireless operator,
Sgt Norman Vivian Thornton, air gunner,
Sgt Clarence Wayte, air gunner.