Pictures of units for WWI mod

The 1911 uniform replaced the blue uniform with the exceptions noted above. The 1911 khaki colored version (called khaki in the west the colour was actually a yellowish-brown called Ochre) of the blue uniform. The new flat topped peaked cap had a red band, the tunic collar had swallow tailed red patches and the shoulders had red shoulder bars (see photograph opposite) to indicate rank. The uniform was produced in wool for winter and cotton for summer wear.

Contrary to common misconception, the M15 helmet was not designed to protect the wearer from direct impact by rifle or machine gun bullets.

The helmet proved to be fairly effective against shrapnel and it was cheap and easy to manufacture. As a consequence, more than three million Adrian helmets were produced, and they were widely adopted by other countries including Belgium, Brazil, China, Greece, Italy (including license-built versions), Japan, Luxembourg, Mexico, Morocco, Peru, Poland, Romania, Russia, Serbia, Spain, Siam, United States, U.S.S.R., and Yugoslavia, each of these nations adding its own insignia to the front of the helmet.

However, because the new steel helmets offered little protection against actual bullets, they were reportedly often among the first pieces of equipment to be abandoned by soldiers on the battlefield.