that were widely used by French artillery regiments, theoretically to fire on field fortifications (trenches,
shelters, etc.). The 1904 model was to be used pending the production of
more modern equipment. In August 1914, 104 155 CTR pieces were assigned to the five heavy artillery regiments, each supplied with 540 rounds, for a total of 78,000 rounds. To improve range during the First World War, the
artillerymen increased the powder charge, which led to very rapid wear and tear on
the barrels. The 155 mm CTR model 1904 howitzers were gradually withdrawn from service until the last one was replaced by the 155 C model 1915 Saint-Chamond and model 1917 Schneider guns.
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