three momentous factors will mark the war of the future.

"Masses" signify in themselves an increase of strength, but they contain
elements of weakness as well. The larger they are and the less they can
be commanded by professional soldiers, the more their tactical
efficiency diminishes. The less they are able to live on the country
during war-time, especially when concentrated, and the more they are
therefore dependent on the daily renewal of food-supplies, the slower
and less mobile they become. Owing to the great space which they require
for their deployment, it is extraordinarily difficult to bring them into
effective action simultaneously. They are also far more accessible to
morally depressing influences than compacter bodies of troops, and may
prove dangerous to the strategy of their own leaders, if supplies run
short, if discipline breaks down, and the commander loses his authority
over the masses which he can only rule under regulated conditions.

The increased effectiveness of weapons does not merely imply a longer
range, but a greater deadliness, and therefore makes more exacting
claims on the _moral_ of the soldier. The danger zone begins sooner than
formerly; the space which must be crossed in an attack has become far
wider; it must be passed by the attacking party creeping or running. The
soldier must often use the spade in defensive operations, during which
he is exposed to a far hotter fire than formerly; while under all
circumstances he must shoot more than in bygone days. The quick firing
which the troop encounters increases the losses at every incautious
movement. All branches of arms have to suffer under these circumstances.
Shelter and supplies will be more scanty than ever before. In short,
while the troops on the average have diminished in value, the demands
made on them have become considerably greater.