The Friday The 13th Raid

For my 13th Rat Patrol submission, I'm doing a Friday the 13th story. Note: This is not a horror story but a look at superstitions of various groups. Also I am not using 'Libya', since it didn't become a Kingdom until 1951. I am instead using the regions of Tripolitania, Fezzan and Cyrenaica. Finally, I just can't seem to write a story without our favorite German, Dietrich.