AMERICAN WW2 FIELD MANUAL UNARMED DEFENSE 1942

This is an original American military 1942 Field Manual.  Paperback. Field Manual number 21-150.   

As stated on the front of the manual.

War Department
Basic Field Manual
Unarmed Defense for the American Soldier
June 30, 1942
Published by the United States Government Printing Office, Washington in 1942.

Note that there is some damage inside the manual as seen in the images.