Didn’t get through the whole thing, but sounds like the point was so that people living that place should learn it.
What’s up with people making an inyan of printing it in remote locations where no Jews live?
In addition to encouraging learning, the Rebbe ascribed spiritual significance to having a Tanya printed in a place.
Originally the campaign was to print in each country where there were Jews. The Rebbe later expanded "every place where there are Yidden, even a place where there is just one Yid."
I don't think there is any inyan to bring Jews to a place just to print a Tanya, but if there are Jews (in this situation Israeli soldiers) there, a Tanya should be printed.