Were the howitzer, about 100mm brass shell cases from WW1, reused

Original WWI U.S. 1917 Pattern Snyder 155mm Artillery Howitzer Manufac – International Military Antiques

Artillery Shells - Denmark

Who invented howitzers? - Quora

4 Wwii And Postwar Spent Artillery Shell Casings

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Old artillery shell hi-res stock photography and images - Alamy

105mm Howitzer Ammunition - Ammunition

Were there really piles of spent artillery shells littered across the battlefields of WW1? If so, what'd they do with them all after the Armistice? - Quora

world war one - What's this 1917 shell casing, more exactly? - History Stack Exchange

WWI Trench Art Vase 1916 Polte Magdeburg Shell

What was Big Bertha in WW I? - Quora

What is the impact on WW1 of the use of howitzers? - Quora