As someone who raised similar qualms about the Siberian AEF, I was assured by Watson that it would be tackled in the next book. (I presume because if they were brought in in book 1 and 2, there would have been a lot of them just sitting around and being shot at.)
As someone who raised similar qualms about the Siberian AEF, I was assured by Watson that it would be tackled in the next book. (I presume because if they were brought in in book 1 and 2, there would have been a lot of them just sitting around and being shot at.)