World War I howitzers

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The term "Howitzer" is used to describe a cannon which fires a shell in a high curving trajectory, as compared to a Gun which fires a shell in a relatively flat trajectory. The precise dividing line between mortars and howitzers varies, and European countries such as Austria referred to long range guns as large as 305 mm as siege mortars which could also be called howitzers. In general howitzers have much longer range than mortars.