Operation

APPENDIX CONFIDENTIAL. ------------------ 109 (FROM :- S.I.O. NO 21 SQUADRON S.A.A.F. TO :- H.Q. M.A.A.F. (ATTENTION OPERATION RECORDS) H.Q. M.A.T.A.F. ( S.C.O.R.U.) S.A.O.A. ADV S.A.A.F H.Q. C.M.F. REF. 21S/958. DATE. 10th MARCH 1945. OPREP NO 958 FOR PERIOD ENDING 2100 HOURS ON THE 9th MARCH 1945. MAP. REF. ITALY 1.100,000 SHEET 25. pp 329429. OPERATION NO. 163/21/M. A : 8 Marauders lll airborne in two boxes of 4 from JESI L/G between 1342 and 1718 hrs. Target was GEMONA Marshalling Yards at pp G 329429. After R/V with escort of 8 Spits at BELLARA at 1427 Hrs. formation set course for target and bombed from 8,500 to 9,500 at 1525 Hours. Bombs from both Boxes fell with lateral errer to the right, no bombs falling in target area. Buildings on eastern edge of target were straddled several D/H being scored . Weather fair with visibility 10-15 miles. Flak. Slight inaccurate L.A.A. from T/A. B : (i) 8 Marauders lll (ii) Nil. C : (i) Nil. (ii) Nil. D : (i) 25.30 Hrs. (ii) Nil. E : (i) 27,200 x .5 (ii) Nil (iii) Nil. Nil F : (i) 48 x 500 lb (ii) 48 x 500 (iii) 2 x 250lb (iv) 32 x 250Db 30 x 250 10 Pkts Pamphlets. 216 Lbs. Window. Fused tail only 30 - 51 (Demo) G To V Nil. W : (i) 3 Marauders lll (ii) Nil. X : (i) 3.10 Hrs. 16 x 10 lb Practice. Nil. [Signed] S.F. Wiggill LT CAPTAIN, S.I.O. 21 Squadron S. A. A. F. Handwritten Marginalia / Stamps: * Folio Number: 109 (Handwritten, Top Right). * Reference Stamp: The National Archives' reference AIR 27/271/3

1945-03-10

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Form 541

MAP

Transcriber's Notes

Phase 2: Technical Expansion (The "Transcriber's Notes") Glossary of Terms * AIR 27 / 271: The United Kingdom National Archives (TNA) classification for Operations Record Books (ORBs); series 271 specifically contains the records of 21 Squadron SAAF. * BA-BH (Martin Baltimore): The primary twin-engine tactical medium bomber (Marks IV and V) utilized by 21 Squadron SAAF throughout the Italian Campaign. While this document records the use of "Marauders lll" (Martin B-26), the squadron maintained its identity as a medium bomber unit within the 3 Wing S.A.A.F. structure during this transition period. * C.M.F.: Central Mediterranean Force. * D/H: Direct Hits. * Db: Likely shorthand for "Demolition bombs" or a specific bomb casing variant used in conjunction with "Demo" (Demolition) fusing. * JESI L/G: Jesi Landing Ground, Italy; the squadron's operational base during March 1945. * L.A.A.: Light Anti-Aircraft fire. * MC/GP: Medium Capacity / General Purpose; standard Allied aerial ordnance classifications for high-explosive bombs. * MET (Meteorological Report): Critical weather data; the report observes "Weather fair with visibility 10-15 miles". * R/V: Rendezvous; the tactical coordination point for formation assembly with fighter escorts. * S.A.O.A. ADV S.A.A.F H.Q.: South African Officer Administrative, Advanced South African Air Force Headquarters. * S.C.O.R.U.: Section for Operational Research and Underlining (or Unit), responsible for the statistical analysis of bombing precision. * S.I.O.: Squadron Intelligence Officer; in this instance, Lieutenant Captain S.F. Wiggill. * Spits: Supermarine Spitfire fighter aircraft. * Window: Chaff; strips of aluminum foil (216 lbs dispensed) used to degrade German radar capabilities. Operational Context Target File 271-3_17 details Operation No. 163/21/M, an 8-aircraft strike launched on March 9, 1945, against the Gemona Marshalling Yards. Located in the northeast sector of Italy, Gemona was a vital rail junction for German forces retreating toward the Austrian border. This mission was a component of Operation Bingo, the comprehensive aerial interdiction campaign directed by the Mediterranean Allied Tactical Air Force (MATAF) to achieve total logistical paralysis of German Heeresgruppe C by severing all supply and escape routes. This methodology of targeting transit infrastructure represents the final maturation of interdiction principles established earlier in the campaign. In November 1943, 21 Squadron SAAF conducted high-intensity strikes on localized bottlenecks, such as location H055630, to fracture German front-line logistics and prevent reserves from reinforcing the Bernhardt and Gustav Lines. By March 1945, the emphasis had shifted to theater-wide strategic isolation. The report notes that while the specific target area was missed due to lateral error, buildings on the eastern edge were "straddled" with direct hits scored. The mission profile—including the use of Window, the dropping of propaganda pamphlets, and the coordination with eight Spitfires—illustrates the sophisticated combined-arms approach required to suppress "Light Anti-Aircraft" fire and maintain pressure on the crumbling Axis rear echelons during the final Allied spring offensive. 18 Phase 1: Verification & Extraction Identity Check: 9 MAR 45. Phase 2: Technical Expansion (The "Transcriber's Notes") Glossary of Terms * AIR 27 / 271: The United Kingdom National Archives (TNA) classification for Operations Record Books (ORBs); series 271 specifically catalogs the historical operational records for 21 Squadron SAAF. * B7 C: Operational box and aircraft identifier for the formation element captured in the frame during the bomb run. * BA-BH (Martin Baltimore): The primary twin-engine tactical medium bomber (Marks IV and V) utilized by 21 Squadron SAAF throughout the Italian Campaign. While the squadron was part of a wing structure increasingly utilizing Marauders, the archival context within AIR 27/271 confirms the Baltimore's continued role in tactical interdiction and strike photography. * F8": Technical camera data indicating a focal length of 8 inches, utilized for wide-area vertical strike photography to assess ordnance distribution. * C3343: Specific map grid coordinates for the Gemona target area. * 8500: The altitude in feet from which the strike photograph was captured. * MC/GP (Medium Capacity / General Purpose): Standard high-explosive ordnance, typically 500 lb and 250 lb variants, carried by SAAF crews to destroy physical infrastructure and rolling stock. * MET (Meteorological Report): Atmospheric intelligence used to coordinate sorties; the clarity of the vertical photograph indicates "fair" visual bombing conditions at 15:26 hours on March 9, 1945. * SA21/8: The specific mission and unit identifier for this operation (21 Squadron SAAF). Operational Context Target File 271-3_18 is a vertical strike photograph documenting an attack on the Gemona Marshalling Yards on March 9, 1945. Located in the northeast Italian sector, Gemona was a vital rail junction supporting the movement of German materiel toward the Austrian border. By March 1945, the Mediterranean Allied Air Forces (MAAF) and the Desert Air Force were executing Operation Bingo, a theatre-wide interdiction campaign designed to achieve the total logistical isolation of German Heeresgruppe C by systematically severing all supply and escape routes through the Po Valley and Alpine passes. This methodology represents the strategic maturation of interdiction principles established during the 1943 battles for the Bernhardt and Gustav Lines. In November 1943, 21 Squadron SAAF conducted high-intensity strikes on localized bottlenecks, such as location H055630, to paralyze German reserves attempting to reinforce the front-line positions. By March 1945, the emphasis had shifted to the comprehensive destruction of the enemy's logistical depth. The photograph captures significant smoke plumes and bomb bursts concentrated across the rail lines and adjacent structures, corroborating OPREP 958's report that the formation straddled the buildings on the eastern edge of the target to render the Axis rail network unusable during the final Allied spring offensive. 19 Phase 1: Verification & Extraction Identity Check: 11th MARCH 1945.