A Howitzer usually has a shorter barrel than a Gun, and has a higher angle of trajectory. This enables the Howitzer to drop it's shells onto a target from a high angle. This indirect fire enabled Howitzers to fire on targets hidden behind natural or man-made obstacles, and were better able to deal with fortifications, making them extremely important during the First World War.

4.5 inch Howitzer

6 inch 30 cwt Howitzer

6 inch 26 cwt Howitzer

8 inch Howitzer Mk I-V

8 inch Howitzer V-VII

9.2 inch Howitzer

12 inch Howitzer

15 inch Howitzer