U.S Army Field Manuals
(PDF Format):

FM 21-76-1
"Survival, Evasion, and Recovery"

FM 21-60
"Visual Signals"

FM 3-25.26
"Map Reading and Land Navigation"

FM 3-97.61
"Mountaineering"

FM 21-11
"First Aid For Soldiers"

FM 3-4
"N.B.C. (Nuclear, Biological, Chemical) Protection"

FM 8-284
"Treatment of Biological Warfare Casualties"

FM 21-50
"Combatives"

FM 31-70
"Basic Cold Weather Manual"

ST 31-91 B
"Special Forces Medical Handbook"