I started reading the first book in this series a few years ago, about 2015, and am in the mood to re-read and then finish the series, but have completely forgotten the title of both the book and the series as well as the author's name.
The book had already been published for a couple of years and at the time of initial reading I think there were three books in total in the series, though I am unsure on that.
The book setting was in a post apocalyptic world where humans fought vampires. It was fairly grim dark in tone. I think the vampires had bone cities, the humans iron ones and that there were plains of salt between where the two skirmished. The main protagonist was a young male soldier who I think used a glove like device to perform magic.
I am pretty sure I remember an early scene in the book where there was a patrol killed in some sort of storm or fog.
It is not The Passage by Justin Cronin.