4 Belgian military maps of Houthulst and environments (West Flandres) from the last days of World War I, with a detailed depiction of the battlefields figuring the Belgian and German trenches ("Canevas de tir") and a high density of military, logistic and strategic data.

Lithography (general fragile condition).

1. 31 octobre 1917 - Clercken-Langemarck - Canevas de tir - Plan directeur. 74 x 104 cm (sl. browned, tears in fold, restorations on verso, stains). Map (scale 1/20.000) figuring the woods ("Vrijbos") in Houthulst at its centre and a curved defensive line reaching from Vijfhuizen over Zevecote to Passchendaele with inscription "Première ligne au 30 Octobre 1917" (printed in red) in front of the German lines (printed in blue). - 2. 1 septembre 1918 - Houthulst. Canevas de tir. 64,5 x 99,5 cm (tears in folds). Map (scale 1/20.000) with German positions of cannon artillery and anti-aircraft guns in the "Vrijbos" in Houthulst on a grid from Clercken to Poelcapelle/Westroosebeke. The final offensive at Houthulst took place on September 28-29. - 3. 20 septembre 1918 - Woumen - Plan directeur. 120 x 95,5 cm (tears in folds, restorations on verso, edges frayed, printed on re-used military map material). Large map (scale 1/10.000) figuring defensive lines from the north of Woumen to the south of Mangelaere, printed in red, with additions in blue pencil. The village of Woumen was liberated on September 28th. - 4. Nieucappelle-Crombeke - Canevas de Tir. 90 x 74,5 cm (traces of folds, edges soiled, printed on re-used military map material). Map (scale 1/20.000).