Collection search - Operations. Canal du Nord (B.W.) Sector. Maps: 1) 51b S.E.; 2) 57c N.E.; 3) Sketch Map Canal du Nord; 4) Enemy Order of Battle; 5) Mosaic - Bourlon - Cambrai Area 1:20,000 (issued to Bds. Only); 6) Mosaic - Bourlon Area. 1:10,000; 7) Selected Oblique Photos