It carried all the mystery and menace of a fog rolling toward you across the sea.

The uniform aided this impression.

In it each man moved under a cloak of invisibility.

Only after the most numerous and severe tests at all distances, with all materials and combinations of colors that give forth no color, could this gray have been discovered.
That it was selected to clothe and disguise the German when he fights is typical of the General Staff, in striving for efficiency, to leave nothing to chance, to neglect no detail.
After you have seen this service uniform under conditions entirely opposite you are convinced that for the German soldier it is one of his strongest weapons.

Even the most expert marksman cannot hit a target he cannot see.