foxhole

potero The burrow in the ground where a fox lives.
puhekieltä A small pit dug into the ground as a shelter for protection against enemy fire.
1962: Hoxie Neale Fairchild, Religious Trends in English Poetry: 1880–1920: Gods of a Changing Poetry (Columbia University Press), http://books.google.co.uk/books?id=Wv4eAAAAIAAJ&q=%22there+are+no+atheists+in+foxholes%22&dq=%22there+are+no+atheists+in+foxholes%22&lr=&as_drrb_is=b&as_minm_is=0&as_miny_is=&as_maxm_is=0&as_maxy_is=1940&num=100&as_brr=0&ei=K3B0S8LYG5y2NMP6sbsE&cd=2 page 378:

The statement made during the Second World War that “there are no atheists in foxholes” is absurd. Foxholes teem with atheists—who, to be sure, frequently infringe the Third Commandment in their desperation.