The Industrial Revolution furnished armies with mass-
produced weapons that were at once precisely manufactured
and cheap. In the second half of the century almost every span
of five years brought radical changes in the technology of kill-
ing: the first rifled small arms and artillery gave unprecedented
increases in accuracy and range in the 1850s; and over the next
three decades single-shot breech-loaders, magazine rifles and
the Maxim gun produced successive and significant increases
in the rate of fire. By the end of the century high explosives,
'smokeless' powders and barbed wire were all available for
military use.
We associate the second, or 'light' Industrial Revolution with
oil, the internal-combustion engine and electricity. In warfare
the effect was felt in the dimensions of speed, range and con-
trol. The first man-carrying mechanical aircraft took to the air
in 1903, and within eight years the Italians were employing
bomber aircraft in Libya. The first tanks were seen in 1916.
They were slow, thin-skinned and unreliable, but they were
used with increasing force and effect, and by the end of the
Great War they had established a claim to be considered, at the
very least, as an important adjunct of modern warfare.
In the Great War it was still very difficult to coordinate the
action of the new weapons and forces. However, a solution
was at hand by the 1930s, and it was provided by compact,
reliable and long-range field radios—which became a vital in-
gredient of the blitzkrieg style of warfare. It was probably no
coincidence that Heinz Guderian, the creator of the German
Panzer arm, had specialised experience of signals. Taken together,
the products of the 'light' Industrial Revolution gave skilled com-
manders the means of overcoming the defensive firepower which
had dominated most battlefields in the Great War.
Notions about the purpose and general conduct of warfare
were strongly influenced not just by increases in technical po-
tential but by the example of Napoleon and the reading, or
rather the misreading, of the writings of the Prussian military
philosopher Karl von Clausewitz (1780-1831). Military activity