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Artillery just means missiles today.

In WWI did artillery and mortars worked the same way only difference being the angle its being fired at, and how big the projectile is.

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    Mortars are just a specific type of artillery. – KillingTime Nov 21 '18 at 18:41
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    I'm not sure I'd agree with your first sentence. Many armies still have field guns and mortars in their inventories. – Steve Bird Nov 21 '18 at 18:43
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    Welcome to History:SE. What has your research shown you so far? Where have you already searched? What did you find? Please help us to help you. You might find it helpful to review the site tour and Help Centre and, in particular, How to Ask. – sempaiscuba Nov 21 '18 at 18:47
  • The US Army and Marine Corps recently fielded a new towed howitzer, the M777, the M109 self propelled gun is still widely used within the US Army, and there's a new version of the M109, the A7, in development. Many other nations are still using and developing tube artillery systems, so traditional tube artillery is most certainly not obsolete. – Davidw Nov 22 '18 at 6:37
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Prior to the mid 1850's the distinction was between:

  • cannons (ie guns) firing direct-fire only at trajectories near 0 degrees;

  • howitzers firing indirectly at higher arcs but still less than 45 degrees;

  • mortars firing indirectly at angles well above 45 degrees, usually near vertical.

At this time Mortars were strictly a heavy siege weapon.

The introduction of the Napoleon 12-pounder in the 1850's merged the first two categories in a single piece, a hybrid gun, capable of both direct and indirect fire. Mortars remained a separate class.

By the First World War a portable trench mortar had been developed that could be setup in a trench and firing an exploding shell with an impact fuse against enemy trenches. By the end of the war the classic Stokes 3" Mortar was seeing wide use by British and U.S. troops

A variety of howitzers ranging from 75 mm to 420 mm in calibre were used by the various sides through the early part of the war, with the massive Big Bertha howitzer able to reach Paris from over 75 miles away. By this point combat ranges and exploding shells had made direct fire largely pointless. This would remain the case until anti-tank guns and anti-aircraft guns were developed between the wars.

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    What sort of proximity fuses were used in WWI? Radio proximity fuses are a WWII invention. – John Dallman Nov 22 '18 at 18:57
  • @JohnDallman: Oops! You are correct, WW1 mortars used an impact fuse. – Pieter Geerkens Nov 22 '18 at 20:38

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