than tactical handling, which is usually of the simplest description.
MOUNTAIN WARFARE
"The principle of always having bodies of men in rear or on the flanks, covering by their fire the advance or retirement of the troops nearest the enemy, is specially important in hill fighting. On nearly every ridge and spur positions will be found where this can be done, and advantage can also often be taken of parallel features, from which covering and cross fire may be used with effect."[A]
It will seldom be possible to make much use of machine guns with the advanced guards, as mountaineers usually oppose the advance by bands of skirmishers who fire from the cover of rocks and scattered sangars, and while affording a bad target to the machine gun, can quickly put it out of action by concentrating their fire upon it. They are also unsuitable for piqueting the heights, on account of the difficulty of getting them into position and of rapidly withdrawing them again. They are, however, very useful to strengthen small fortified posts on the lines of communications, and for the defence of camps by night, being trained by day and the sights prepared as suggested in Chapter VII., page 150. Callwell says: "It is a good plan, if night attacks are at all probable, to train guns and machine guns by daylight upon points where the enemy
