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Already before the war
had
the German Army started investigating the possibility of introducing
a cross country truck, to be used as a carrier for a anti-balloon gun or simply as a tractor for heavy artillery pieces.
Consequently they were much interested when they heard of such a
design, the Marienwagen, made by the engineer Hugo G. Bremer.
In
June 1915 Bremer was given the go-ahead. The Marienwagen
cross-country lorry, produced in the Daimler factory at
Berlin-Marienfelde, was a pretty complicated vehicle, that went
through several re-designs and test (not all successful), and which
appeared in several forms, some semi-tracked, others full-tracked,
although the basis of them all was the Daimler four-ton lorry.
After
the first British tanks had appeared during the later stages of the
Battle of The Somme in 1916, the chocked Germans searched meet this
new and unexpected threat with vehicles of the same kind. One of
the first ideas (which was a desperate stop-gap measure really) was to turn the Marienwagen into a sort of tank, and
an order was issued to convert ten lorries into AFV:s. The order
stated that these 10 AFV:s were to be delivered in the end of
february 1917.
The
work of turning these fully tracked lorries into armoured vehicles
was led by Josef Vollmer, senior engineer of the VPK, the
Motor Transport Inspection Service. The aim was to substitute an armoured
hull in place of the normal lorry cab and body, and armouring the
engine. The lorry transmission in the MarienWagen was adapted to
drive the rear pair of tracks, which were of rudimenary design,
sprung on semi-elliptic leaf springs. The front pair of tracks were
also sprung on semi-elliptics: they were used only for steering and were
not driven.
The
result of this work was the armoured Marienwagen, or as it was
called officially Marienwagen I mit Panzeraufbau. This can be
seen as the first German tank, since it was completed by the early
Spring of 1917. But it was not a tank technically speaking, only
tactically. It was, in fact, more
of an armoured personnel carrier: it had no fixed armament, although
ports were provided for the use of the crew's weapons. (The vehicle
was to be equipped with two HMG:s and two 20mm Bekker AA guns, plus
a flame thrower and other close combat weapons, to be used outside
the vehicle.)
Officials
had already in october 1916 declared that the Marienwagen was not
suitable to be used as a AFV, but work continued despite this. (Also,
the Prussian War Office pressed ahead with the work on setting up
on setting up the very
first armoured units of the German Army, the ancestors of the
famed Panzer Divisions!: Sturm-Panzerkraftwagen-Abteilung 1 and
2).
A Marienwagen
with a mock-up armoured superstructure was to von Hindenburg, Ludendorff
and other members of the General Staff at Mainzer Sand on 11 March 1917.
It was a disaster. (It was underpowered, and because of its height
it also had a very high centre of gravity, of course making it very
prone to toppling over.) The generals were very disappointed with what
they saw, and as a result, Ludendorff lost all interest in further
German tank development. Without his interest and support the whole
area was left to "quarrels and rivalries of subordinate
authorities" (Hundleby and Strasheim), with the effect that the
further development of German tanks were much delayed. And the whole plan of using the
Marienwagen as a AFV was finally scrapped.
Later
on, as a private venture, a semi-tracked version of the Marienwagen
(for which a much more
satisfactory type of rear track had been developed) was fitted with
the armoured hull and turret of an Ehrhardt armoured car. This was
only an experimental vehicle, but is interesting in foreshadowing
the impressive development by the Germans of armoured halftracks in
WW2.

This photo probably shows
the bungled trial of MArch 11, 1917
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