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Mortar (weapon)

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A mortar is a special kind of cannon used to launch explosive shells. These shells are often called bombs.

M120 Mortar in Zabol Province, Afghanistan
M120 Mortar in Zabol Province, Afghanistan

Most mortars are simple and lightweight tools. They are easy for one person to carry to different places. A mortar usually has a metal tube that is smooth inside. Some models have a rifled barrel, which has grooves to help the bomb fly straight.

L16 smoothbore
L16 smoothbore

To keep the weapon steady, it sits on a base plate. This plate helps spread out the recoil, which is the kick from the launch.

Mortars are used for indirect fire. This means they shoot in a high, arching path called a ballistic trajectory.

ATP 3-21.90 Figure 5.1 Example of range coverage from defilade
ATP 3-21.90 Figure 5.1 Example of range coverage from defilade

How does a mortar work? The way it works depends on the design. In a modern Stokes mortar, a soldier drops a bomb into the tube.

WilfredStokeswithMortar
WilfredStokeswithMortar

At the bottom of the tube, there is a firing pin. The bomb has a part called an impact sensitive primer. When the bomb hits the pin, the primer makes it explode. This force pushes the bomb out of the tube toward the target.

Some other versions, called spigot mortars, work differently. Instead of a tube, they use a solid rod called a spigot. The bomb fits over this rod to launch.

A hedgehog launcher on display
A hedgehog launcher on display

Mortars have a very long history. The earliest use was in Korea during a naval battle in 1413.

Improvised-mortars-batey-haosef-1-1
Improvised-mortars-batey-haosef-1-1

Korean gunsmiths made a gourd-shaped mortar called a wan'gu. A man named Ch'oe Hae-san is credited with inventing it. Much later, in 1701, Baron Menno van Coehoorn made a version that was easier to move. In 1915, Sir Wilfred Stokes created a design that one person could carry.

WilfredStokeswithMortar
WilfredStokeswithMortar

This was very helpful during the muddy trench warfare of the First World War. The Stokes mortar could fire as many as 25 bombs every minute.

0 Vimy - Mortier de tranchée (2)
0 Vimy - Mortier de tranchée (2)

There are many different types of mortars used in history. During the American Civil War from 1861 to 1865, General Ulysses S. Grant used mortars made from tough wood.

Virginia, Petersburg, Mortar Dictator - NARA - 533349
Virginia, Petersburg, Mortar Dictator - NARA - 533349

He had soldiers bore out logs and bind them with iron bands. In World War I, Germany used short-range weapons called Minenwerfers.

German 7.58 cm minenwerfer
German 7.58 cm minenwerfer

These were used right from the frontlines in trenches. Some mortars are also very huge. For example, the German Karl-Gerät was a heavy siege mortar.

Karl6
Karl6

Other modern versions are mounted on vehicles. These are called mortar carriers.

M113-mortar-carrier-id2008-5
M113-mortar-carrier-id2008-5

Today, you might see mortars used in many ways. Some are small enough for a soldier to carry on their back. Other mortars are part of a big vehicle.

2B9 Vasilek mortar-4058
2B9 Vasilek mortar-4058

These are called gun-mortars because they act like a mix between a mortar and a cannon. They can shoot at high arches or shoot directly at a target. Some mortars are even part of a tank. The Israeli Merkava tank uses a mortar as a secondary tool.

M113-mortar-carrier-id2008-5
M113-mortar-carrier-id2008-5

Whether they are small and portable or huge and mounted on a truck, mortars help reach targets that regular guns cannot hit easily.

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🖼️ Images & Media (19)
File:M120 Mortar in Zabol Province, Afghanistan.jpg
M120 Mortar in Zabol Province, Afghanistan.jpg
File:Venetian siege of Acropolis.jpg
Venetian siege of Acropolis.jpg
Virginia, Petersburg, Mortar Dictator -...
File:German 7.58 cm minenwerfer.jpg
German 7.58 cm minenwerfer.jpg
File:WilfredStokeswithMortar.jpg
WilfredStokeswithMortar.jpg
File:0 Vimy - Mortier de tranchée (2).JPG
0 Vimy - Mortier de tranchée (2).JPG
File:Karl6.jpg
Karl6.jpg
File:M113-mortar-carrier-id2008-5.jpg
M113-mortar-carrier-id2008-5.jpg
File:2B9 Vasilek mortar-4058.JPG
2B9 Vasilek mortar-4058.JPG
File:The Home Guard 1939-45 H12299.jpg
The Home Guard 1939-45 H12299.jpg
File:A hedgehog launcher on display.jpg
A hedgehog launcher on display.jpg
File:Improvised-mortars-batey-haosef-1-1.jpg
Improvised-mortars-batey-haosef-1-1.jpg

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