I’ve got your back

I wish I could think of a better title for this, as it was used in a similar offering on Facebook, but it’s honestly the best title for this concept.  A (very) little research reveals that the phrase originated in WW2, when men were cleaning up remaining enemy pockets after a stronghold had been conquered.  Going into a house or room meant his ammo was pointed ahead, but it left the soldier’s back unprotected. 

Unless his comrade “had his back”. 

But sometimes, the comrade isn’t there.  Or is out of