Aircraft / Aviation Vehicles & Artillery Small Arms Warships & Submarines Military Ranks Military Pay Chart (2024) Special Forces
Land Systems / Battlefield

Krupp Landkreuzer P.1000 Ratte (Rat)

Super Heavy Tank Project [ 1942 ]

If it was completed during the fighting of World War 2, the Landkreuzer P.1000 Ratte would have been the largest tank ever produced.

Authored By: Staff Writer | Last Edited: 06/10/2022 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

The Landkreuzer P.1000 "Ratte" (translating to "Rat") was a proposed super-heavy tank design of the German Krupp concern with origins in 1942. Hitler gave this mammoth undertaking his direct blessing as the program set about to create the most powerful tank ever devised for the modern battlefield. It was an ambitious undertaking to say the least and - should it have been completed - would also have become the largest tank ever produced without doubt. Albert Speer, the German Minister of Armaments and War Production for the Third Reich, saw the fruitlessness of such an endeavor and cancelled the P.1000 in early 1943. As such, the Ratte never made it off of the drawing boards.

Externally, the P.1000 would have dwarfed any other tank in production at that time by a long mile. The immense size would have been something to behold with as many as eleven large road wheels affixed to either track side. The tracks themselves would have measured nearly four feet in width. The hull would have been largely conventional in design and construction by 1942 standards with flat skirted side armor and an angled front and rear hull armor facings. Armor at certain points would have reached between 150mm and 360mm in thickness. The turret would have also sported ballistics deflecting armor for maximum protection. Dimensions were pretty impressive with the P.1000 sporting a height of 11 meters, a width of 14 meters and a length of 35 meters. The overall operational weight was expected to reach 1,000 tons (2,000,000 lb).

In essence, the P.1000 was to have been a large rolling battle platform armed to the teeth. The massive turret would have been positioned well-forward on the hull with primary armament envisioned as 2 x 280mm 54.5 SK C/34 guns fitted in side-by-side mounts, these based on powerful naval warship guns - necessitating the need for a custom-designed to house the twin-artillery arrangement. Essentially, the turret would be a modified heavy cruiser gun emplacement (possibly from the Gneisenau-class) with full 360-degree traverse - albeit slow to move such a heavy fixture. As such, firing "on-the-move" would not have been possible. Secondary armament became a 128mm KwK 44 L/55 anti-tank gun as well as 8 x 20mm Flak 38 anti-tank cannon systems, the latter to combat incoming, low-flying enemy aircraft as the p.1000 would have made a tempting, slow-moving target for many-and-airmen. The 128mm gun system would have been either mounted in the main turret with the twin naval guns or seated in an individual (albeit smaller) turret fitted to the rear of the hull (the exact location of this armament was never formalized). A further fitting of 2 x 15mm MG 151/15 autocannons would have also been part of the armaments package for the P.1000 making for one impressive battlefield combat system. A minimum estimated crew of 20 personnel (though as many as 40) would have been required to man the various onboard systems - a throwback to the large, boxy German tank design of World War 1, the A7V Sturmpanzer-Kraftwagen, which used 18 crew and fielded a 57mm main gun and up to 5 x 7.9mm machine guns.©MilitaryFactory.com
To propel such a behemoth across the battlefields of Europe, Krupp suggested the use of either 8 x Daimler-Benz MB501 20-cylinder marine diesel engines developing an estimated 16,000 horsepower or 4 x MAN V127Z32/44 24-cylinder marine diesel engines of 17,000 horsepower output. The former engine type was utilized in existing German E-Boat systems while the latter was prominent in U-Boat submarine designs. Though an optimistic top speed of 25 miles per hour was envisioned, this was suspect with all things considered. Durable operational range was also of concern, though a hefty 120 miles was entertained. It is assumed that the P.1000 would have been extremely limited in most facets of its general operation - speed, range and reliability - leading many to doubt its true effectiveness in live fire use.

As it stood, the Landkreuzer P.1000 proved just another tangent for Adolf Hitler to commit valuable wartime resources and engineering manpower to. On paper, the P.1000 was a true threat with enough firepower and inherent armor protection to both destroy anything on the modern battlefield and survive most anything thrown in its direction. In reality, the system would have not added much in the way of changing the downward-spiraling German fortunes by the late-war months. The sheer size of the P.1000 would have extremely limited its tactical use and battlefield effectiveness and off-road travel would have proved impossible, more than likely limiting the tank system to operations as a static, fixed defensive weapon protecting a portion of territory within range of its guns. Weight alone would have forced many-a-European-road to simply crumble under the mass of its wheels. Additionally, no bridge in Europe would have supported the passing of the P.1000 requiring transport by railway cars constantly under attack from Allied fighters - however, even railway transport was not really a viable transport form for such a large and heavy vehicle - her width alone would have precluded such use. Furthermore the use of multiple engines in a joined complex arrangement within one hull would have proven a maintenance nightmare for accompanying crew not to mention headaches for when in search of useful spares. With that said, if used at all in combat, the P.1000's reach would have been severely limited by these inherent design restrictions.

While the P.1000 project eventually foundered, the Panzerkampfwagen VIII Maus ("Mouse") went on to become the largest tank to be built in World War 2, though only reaching prototype form in two examples before the end of the war. The P.1000 would, therefore, fall to the pages of history.©MilitaryFactory.com
Note: The above text is EXCLUSIVE to the site www.MilitaryFactory.com. It is the product of many hours of research and work made possible with the help of contributors, veterans, insiders, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at MilitaryFactory AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.


Krupp - Nazi Germany
Nazi Germany (cancelled)
Operators National flag of modern Germany National flag of Nazi Germany
Service Year
Nazi Germany
National Origin
Project Status

Support allied forces through direct / in-direct fire, assault forward positions, and / or breach fortified areas of the battlefield.
Engage armored vehicles of similar form and function.

114.8 ft
(35 meters)
45.9 ft
(14 meters)
36.1 ft
(11 meters)
1,999,998 lb
(907,184 kg)
1,000.0 tons

8 x Daimler-Benz MB501 20-cylinder marine engines developing 16,000 horsepower OR 4 x MAN V12732/44 24-cylinder marine diesel engines developing 17,000 horsepower driving track-and-wheel arrangement.
Drive System
25 mph
(40 kph)
Road Speed

2 x 280mm 54.5 SK C/34 naval guns in main turret

1 x 128mm KwK 44 L/55 anti-tank gun (possibly in hull bow mounting).
8 x 20mm Flak 38 anti-aircraft cannons (possibly in four dual mountings at rear).
2 x 15mm Mauser MG 151/15 autocannons (possibly in smaller turret atop main gun turret).
Dependent upon ammunition carrier.

Landkreuzer P.1000 "Ratte" - Base Series Project Designation.

Military lapel ribbon for the American Civil War
Military lapel ribbon for pioneering aircraft
Military lapel ribbon for the Arab-Israeli War
Military lapel ribbon for the Battle of the Bulge
Military lapel ribbon for the Battle of Kursk
Military lapel ribbon for the Cold War
Military lapel ribbon for the Falklands War
Military lapel ribbon for the Indo-Pak Wars
Military lapel ribbon for the Korean War
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon representing modern aircraft
Military lapel ribbon for the Soviet-Afghan War
Military lapel ribbon for the Spanish Civil War
Military lapel ribbon for the Ukranian-Russian War
Military lapel ribbon for the Vietnam War
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2
Military lapel ribbon for the Yom Kippur War
Military lapel ribbon for experimental military vehicles


1 / 1
Image of the Krupp Landkreuzer P.1000 Ratte (Rat)
Image copyright www.MilitaryFactory.com; No Reproduction Permitted; Image represents artist impression.

Disclaimer | Privacy Policy | Cookies

2024 Military Pay Chart Military Ranks DoD Dictionary Conversion Calculators Military Alphabet Code Military Map Symbols

The "Military Factory" name and MilitaryFactory.com logo are registered ® U.S. trademarks protected by all applicable domestic and international intellectual property laws. All written content, illustrations, and photography are unique to this website (unless where indicated) and not for reuse/reproduction in any form. Material presented throughout this website is for historical and entertainment value only and should not to be construed as usable for hardware restoration, maintenance, or general operation. We do not sell any of the items showcased on this site. Please direct all other inquiries to militaryfactory AT gmail.com. No A.I. was used in the generation of this content; site is 100% curated by humans.

Part of a network of sites that includes GlobalFirepower, a data-driven property used in ranking the top military powers of the world, WDMMA.org (World Directory of Modern Military Aircraft), WDMMW.org (World Directory of Modern Military Warships), SR71blackbird.org, detailing the history of the world's most iconic spyplane, and MilitaryRibbons.info, cataloguing military medals and ribbons. Special Interest: RailRoad Junction, the locomotive encyclopedia.

©2023 www.MilitaryFactory.com • All Rights Reserved • Content ©2003-2023 (20yrs)