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Big Bertha
Dicke Bertha.Big Bertha.jpg
One of the first Big Berthas being readied for firing
Type Heavy siege gun
Place of origin  German Empire
Service history
Used by  German Empire
Wars World War I
Production history
Manufacturer Krupp
No. built 12
Mass 43 tn (96,000 lb)
Length 5.88 m (19.3 ft)

Shell HE; 820 kg (1,807 lbs)
Calibre 419 mm (16.5 in)
Elevation +40° - +75°
Muzzle velocity 400 m/s (1,312 ft/s)
Effective firing range 12.5 km (7.8 mi)
Musee-de-lArmee-IMG 0984
Model of the road-mobile "M-Gerät" (M-device) version. The model can be seen at the Paris Army Museum
42 cm Gamma Mörser AWM A02560
Gamma-Gerät (Gamma-device)- the railway-transported, concrete-emplaced predecessor to the Big Bertha

Big Bertha is the name of a type of super-heavy howitzer made by the famous armaments manufacturer Krupp in Germany on the eve of World War I. Another huge gun, 42-cm Gamma-Device howitzer, was the forerunner of the Bertha.


Bertha's official name was the L/12 (the barrel was 12 calibre in length), or the M-Device.

Many sources say that Bertha is a reference to Bertha Krupp, heiress and owner of the Krupp industrial empire. However, not all accept this. During the war, the Germans gave numerous other nicknames to the M-Device. 'Dicke', meaning fat or big in German, is apparently not a reference to the physical aspect of Ms Krupp.

The name "Big Bertha" subsequently came to be applied generally by the Allies to any very large German gun. This included the railway guns which used mounted battleship guns known as "Langer Max" and the ultra-long range "Paris Gun". Strictly speaking, however, Dicke Bertha, or Big Bertha, is only applicable to the 42-cm M-Device howitzer.


Bertha was the result of lessons learned by the Germans (and Austrians) from the Russo-Japanese War of 1904-05. During the war, the Japanese had dismounted a number of their coastal defence 28-cm howitzers and used them to help break their siege of the fortified Russian naval base at Port Arthur.

This was a complete novelty as, until that time, it had been assumed by military experts that the largest transportable siege guns were around 20-cm in calibre. Other Europeans completely failed to draw the lessons the Japanese had taught, and went forward withough any huge siege guns.

In use

Big Bertha gained a strong reputation on both sides of the lines due to its early impressive successes in smashing the forts at Liege, Belgium. The German press went wild with enthusiasm and declared the Bertha a 'wonder weapon'. When used later during the German assault upon Verdun in February 1916, however, it proved less effective, as the fort, made of concrete reinforced with steel, could mostly withstand the large semi-armour-piercing shells of the Berthas. Only Fort Vaux was severely damaged during this event, destroying the water storage and leading to the surrender of the fort.

A total of 12 complete M-Devices were built; besides the two available when the war started, ten more were built during the war. This figure does not include additional barrels.

As the war ground on several Berthas were destroyed when their barrels burst due to faulty ammunition. Later in the Great War, an L/30 30.5-cm barrel was developed and fitted to a number of Bertha carriages in order to provide longer-range, though not quite as heavy fire.

See also

Kids robot.svg In Spanish: Gran Berta (desambiguación) para niños

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