Army Field Manual FM 31-70 (Basic Cold Weather Manual)
The United States Army
"This manual is designed to prepare the individual soldier and small unit commander to conduct military operations for extended periods of time under the most severe and varying cold weather climatic conditions. The doctrine and techniques in the manual are applicable in any area that has cold weather and snow with their accompanying operational problems. Troops properly trained in this doctrine and these techniques will be able to fight; live; and move in any cold weather area of the world."-From the Introduction.
